GPO, POST OFFICE and BT
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| The British Post Office (BPO) purchased telephones and other apparatus from various
manufacturers. On a lot of equipment the manufacturer can be identified by the use of a
manufacturers code. Where a PO
factory code is shown, that means that the equipment has been made or refurbished by
one of the BPO factories. Quite often these codes are on labels stuck over the
top of the original manufacturer’s code.
It is clear that the original single-letter and later double-letter codes were allocated with fairly little regard to any logical meaning. Once all codes were expanded to at least three letters greater care was taken to make meaningful combinations. Existing two-letter codes were expanded by suffixing 'A' to the original code. The list also includes some non-BPO codes commonly found on telephones (AP, YA and Z). Thanks to many articles from the Telecom Heritage Group, especially the lists compiled by Graham Wooten, Andy Emerson, BT museum and John Ferris. Code Manufacturer A Edison Swan Electric Ltd. AA Pinching & Walton
A9W
Trench & Manhole Covers Ltd AAG Mullards Ltd - London SW18 AB A. C. Brown AC Nalder Bros. & Thompson ACL Advance Electronics Ltd. Hainault, Essex. ACW AVO Ltd - London SW1 AD Spagnoletti (see CN) AE Medical Supply Association AEK GEC-AEI Telecommunications, Kirkcaldy, Fife, Scotland AEG GEC-AEI Telecommunications, Glenrothes, Scotland AEY AEI Telecomms Group - Worsley Bridge Rd, London, SE26 AEP Automatica Electrica Portuguesa (not a BPO code - found on phone - see Plessey) AF Armstrong Bros. AG H.W. Bolt AH J.H. Tucker & Co. AJ Consolidated Supply Co. AK Peel-Conner Telephone Works Ltd - became GEC AKA Sterling Telephone & Electrical Co. - Dagenham, Essex AL W. Robinson & Co. Ltd. AM Wrench Mfg. Co. AN E.F. Moy Ltd. ANS Ansaphone Ltd - Camberley, Surrey AO Beck & Co. AP King & Scarborough AP Admiralty Pattern (British Navy). Not a BPO manufacturer code. AQ Gambrell Bros. AR Houghton Ltd. AS Noakes & Sons ASW Armstrong Stevens & Sons - Willenhall, Staffs. AT
McMillan
& Co. ATB Automatic Telephone & Electrical Co. Ltd - Bridgnorth ATL Austin Taylor Electrical Ltd - Bangor, N. Wales ATK Plessey Telecom Group - Kirby Industrial Estate, Liverpool ATL Austin Taylor Ltd - Bangor, N. Wales ATW Automatic Telephone & Electrical Co. Ltd - Wigan, Lancs. AU J. Russell & Co. AUC unknown AV Tylers Ltd. AW W. & F. Dennis & Co. AX H. White & Co. AXA H. White & Co. - Yarmouth AY R. Lambert AZ R. & J. Irving
B
T. Brittan
Ltd BAB AEI Telecommunications, Bristol B2P Inventec Electronics - Malaysia BB Brush Electrical Engineering Co. BBK Bakelite Ltd - Birmingham BBL Britannia Batteries Ltd. BC L. Herve Ltd. BCC Bristol Concrete Co. Ltd. BCL Bratt Colbran Ltd. BD W. T. Henley's Telegraph Works Co. Ltd. BDA unknown BDB W. T. Henley's Telegraph Works Co. Ltd - London (became AEI) BE Callenders Cable & Construction Ltd (later BEB) BEB Callenders Cable & Construction Ltd - London E16 (previously BE) BEL The British Electric Lamps Ltd. BET The British Electric Transformer Co. Ltd. BF E. Spencer & Co. Ltd. BG Johnson & Phillips Ltd. BH Newton Chambers & Co. BJ Harcourts Ltd. - Birmingham BJB Bayliss, Jones & Bayliss Ltd. BK Magneta Time Co. Ltd (late Silent Electric Clock Ltd.) BL A. Bocchi BLD Birkby's Ltd - Liversedge, Yorks. BM H. Wallis BN Karabon Co. (see EJ) BNSF British NSF Co. Ltd. BO Standard Woodwork Co. BQ Stockall Marples & Co. BS Everett, Edgcumbe & Co. BSD Mullard Radio Valve Co. - Mitcham, Surrey BT Prescot Clock & Mechanical Co. BTR Blick Time Recorders Ltd. BU C.H. Glover & Co. BUL Bullers Ltd. - Stoke on Trent BV Brown & Co. BW Cossor Ltd. BX Williamson Clock Co. Ltd. BY G. Welch & Sons
C General Electric Co. - Coventry, originally Peel Conner Ltd. (later GEC) C Found near a screw terminal - means Carbon and is the positive connection of a primary battery CA Blunden CB Chubb & Sons Lock & Safe Co. Ltd. CCA Carron Co (previously CC) CCB Creed & Co. Ltd - Brighton, Surrey CCD Creed & Co. Ltd - Croydon, Surrey CCL Cathodian Crystals Ltd - Needs confirmation may be incorrect or an in house code. CD Malcolm & Co. CE Boulton & Paul Ltd. CF H.W. Sullivan CG Grimshaw, Baxter & Elliott CH Alfred Graham & Co. CJ Ingram Bros. CK H. White & Co. Ltd. (Watchmakers) - London EC1. CL Prison Commissioners of Scotland CLS Concrete Ltd. CLV Colvern Ltd. CM Mitchell CN Park Royal Engineering Co. Ltd, successors to Spagnoletti (see AD) CO D.H. Bonnella & Son Ltd. CP Weston Electrical Instrument Co. Ltd. CPL Crompton Parkinson Ltd. CR Crystalate Co. Ltd. CS E.F. Gurnett CSB E.S. Gurnett CT Record Elec. Co. CTP Creed & Co. Ltd - Pontypridd, Glamorgan CU G.L. Beasley CV T.H. Brooker & Co. Ltd. CW Comyn Ching & Co. Ltd. CWL Pye Telecommunications - Cambridge. CW actually comes from Cambridge Works originally in Haig Road, Cambridge CWP The Caxton Wood Turnery Co. CX E. Brook Ltd. CY Marconi Wireless Telegraph Co. Ltd. CYA Marconi Co. Ltd - Chelmsford, Essex CZ A.P. Buchanan
D India-Rubber and Gutta-Percha Telegraph Works Ltd, Silvertown DA W. Cowill & Sons DAE A.P. Besson Ltd - Hove, Sussex DAW Duct & Access Covers PLC - Wales DB J. Gell DBA John Gell Ltd DBK Bakelite Ltd - Durham DC The Synchronome Co. DCA Synchronome Co. Ltd - Wembley, Middx. DD William, Duncan, Tucker & Sons Ltd. DE Muirhead & Co. DEA Muirhead & Co. - Beckenham, Kent DEK Dover Engineering Co. - Dover, Kent DF British Telegraph Instrument Co. DFM Denis Ferranti Meters Ltd - Bangor, N. Wales DG T.O. Blake DH Willing & Co. DJ The Telegraph Construction & Maintenance Co. Ltd. DJA Telegraph Construction & Maintenance Co. - London SE10 (see S and SEG) DK Buck & Hickman DL Drury Bros. DM Vaughtons Ltd. DMR Dynamo & Motor Repairs Ltd. DN H.J. Dawes DNT E. Dent & Co. DO Grant, Cameron & Curle DP Cheshire, Pooley & Co. DR Berry Skinner DS S.G. Jones DT J. Gerrard & Sons DU Cutlans DV Creed & Co. DW Repetition Woodwork Co. DY Staples & Co. DZ Relay Automatic Telephone Co. DZA Relay Automatic Telephone Co.
E Ericsson Telephones Ltd (British Ericsson) - later Plessey, then GPT and then Siemens EA N. Berry & Sons EB Francis & Sons EB Found near screw terminals - means Extension Bell EBL Edison Bell Ltd. EC C. Lange ECS English Clock Systems ED The Waltham Cross Joinery Co. Ltd. EE Isenthal & Co. EEC Elliott Ltd - West Midlands EET Plessey - Beeston, Notts. (formerly Ericsson, see E) EEX Plessey - Sunderland (formerly Ericsson) EF Albion Iron & Wire Work Co. Ltd. EFW F.W. Elliott Ltd. EG S.E. Norris & Co. EH Cambridge Instrument Co. Ltd. EHA Cambridge Instrument Co. - London SW1 EJ C.A. Apperley (Karabon) EK Clacton Joinery & Engineering Co. Actually part of E. K. Cole EL Davis & Timmins EM The BKB Electric Motors Ltd. EMI EMI (Valve Division) - Ruislip, Middx. EN The British Time Recorder Co. Ltd. ENA British Time Recorder Ltd - London EC1 (previously EN) EP Potter & Co. EQ Anode Ltd. ER Bonnella Bros. ERM Epoch Radio Manfg. Co. Ltd. ES Wm. Sanders & Co. ESC Enfield Stone Co. Ltd. ET Baxendale & Co. Ltd. EU Burnham & Co. EV G.W. Evans & Co. EW Baxter & Caunter EX C.A. Carter & Co. EY Buckleys (London) Ltd. EZ Zenith Manfg. Co. Ltd.
F GEC Ltd. FAC Fuller Accumulator Co. (1926) Ltd. FB GPO Factory, Birmingham FBR GPO Factory, Fordrough Lane, Birmingham (repaired apparatus, special cases only) FC Alex. Bruce & Co. FD Messrs. Hailwood & Ackroyd Ltd. FE Dubilier Condenser Co. (1921) Ltd. FEL Fidelity Ltd (see FID) FEN unknown FF Eclat Electric Lamp Manufactory FG Burt, Boulton & Haywood Ltd. FGB Sontranic Ltd - Edgware, Middx. FH GPO Factory - Holloway FHA GPO Factory - Holloway, London (Assembly) FHB GPO Factory - Holloway, London (Construction) FHR GPO Factory - Holloway, London (repaired apparatus, special cases only) FID Fidelity Radio Ltd (see FH) FJ The D.P. Battery Co. Ltd. FJM F.J. Moore Ltd. FK The Alton Battery Co. Ltd. FL The Accumulators of Woking FM Foster's Machine Tool & Engine Co. FMC Calne Electronics - Calne FNB GPO Factory - Edinburgh (Construction) (the N stood probably for ‘North Britain’) FNR GPO Factory - Edinburgh (Refurbish) FR Ferranti Ltd. FRA Ferranti Ltd - Hollinwood FRG unknown FS The Foster Engineering Co. Ltd. FT Messrs. F. Tray & Co. Ltd. FW GPO Factory - Wales (Cwmcarn) FWG STC Consumer Electronics - Cwmcarn (formerly BT factory) FWR GPO Factory - Cwmcarn, Wales (Refurbish)
G General Electric Co (GEC) - see C GAB Greenwood and Butler - Leeds GB Jas. Gibb & Co. Ltd. GC East & Son Ltd. GE G. Bruce GEC GEC Telephones - Coventry GEG
Osram Lamp and Lighting Co. Ltd - Gateshead, Co. Durham GEH GEC - Middlesbrough GEL GEC-AEI Telecommunications - Accrington, Lancs. GEM
Garrard Ltd. GEN GEC-AEI Telecommunications - Newton Aycliffe, County Durham GEP GEC Telecommunications Ltd - Treforest, Pontypridd GF Girlings Ferro Concrete Ltd. GJ Gillett & Johnston GKT GKN PLC - Telford, Shropshire GM G. Mugford GNA Pye, Aidrie (TMC from 1970) - see TMA GNT The Great Northern Telegraph Co. Ltd. of Denmark GS Gillson Syndicate GTE Ferranti joint venture with GTE (USA) GZ Doulton & Co.
H Automatic Telephone & Electric Co (ATE) (formerly ATM, H stands for Helsby) HA Hall Telephone Accessories Ltd. (later HAS) HAA Automatic Telephone & Electrical Co. - Liverpool (later Plessey) HAS Hall Telephone Accessories Ltd (formerly HA) HB Houghton Butcher Manfg. Co. Ltd. HC British Insulated Cables Ltd. HCA BICC Cables - Warrington HCC BICC - Liverpool (ex Helsby Cables) HCL BICC - Leigh (ex Helsby Cables) HCP BICC - Prescot (ex Helsby Cables) HD C.A & A.W. Hayward HDL Hudson's Electrical Devices Ltd - London SW2 HE H. Sloog (makers of Hennite) HEA H.E. Ashdown (Birmingham) Ltd. HF Eames Bros. HG Hart Accumulator Co. Ltd. HH J.E. Hough Ltd. HJ C. Hodges & Co. Ltd. (business purchased by J.L. Gottlieb & Co. Ltd.) HK Hillcrete Ltd. HL Holland & Sons Ltd. HM Chamberlain & Hookham Ltd. HN J. Hannan HND Highton & Sons - Dalston, London, E8 HR Henry Brown & Sons HS Howells & Co. HT A.W. Hart HVA Plessey Hivac Division - Ruislip, Middx (ex Hivac Ltd) HY G.A. Harvey & Co. Ltd.
I (originally) International Electric Ltd. I (later) Ibex, London (later IBX) IA British Die Casting & Engineering Co. Ltd. IB G.H. Bartlett IBX Ibex Telephones - Harrow, London (formerly I) IM Imperial Typewriter Co. Ltd. IMP Imperial Typewriter Co. IT International Time Recorder Ltd
JA J.A. Crabtree & Co. Ltd. JB B.W. Johnson JC J. Chesterman & Co. Ltd. JEK unknown JGS Switchgear Co. JK Brooker and Jackson Ltd. JKA Brooker and Jackson Ltd. - London N1 JM J. McKenzie & Co. JN John Norman Ltd. JR Joseph Reynolds JS J. & E. Bates JX Julius Sax & Co. Ltd. JXA Julius Sax & Co. Ltd.
K Kelvin, Bottomley & Baird Ltd. KA Calders Ltd. KB K. E. Beswick - Frome, Somerset KC E.A. Combs KCP Kent Concrete Products KD J. Cadman & Co. Ltd. KE Chloride Electrical Storage Co. Ltd. KEC E. K. Cole Ltd - Rochford, Essex (later EKCO Avionics) KJ J. Crombie & Son KKA E. K. Cole Ltd - Southend, Essex KL The Crypto Electrical Co. Ltd. KM The Camelinat Co. KNE K & N Electronics Co. Ltd - Maidenhead, Berks. KQ Craig Lelo Quarry Co. Ltd. KR Cryselco Ltd. KRN Krone - Cheltenham KS Carver & Son KT The Croft Granite, Brick & Concrete Co. Ltd. KU The Concrete Unit Co. Ltd. KZ L. Keizer & Co. Ltd.
L Elliott Brothers Ltd LDA Cossor Communications Co. Ltd - Stanmore, Middx. LE Litholite Insulators Ltd. LEA Litholite Mouldings Ltd - Leicester (ex-Watford) LEB Elliott Bros. (London) Ltd - London SE13 (previously L) LER Lero Engineering Company - Coventry LF Lion Foundry Co. Ltd. - Kirkintilloch, Glasgow (later LFA) LFA Lion Foundry Co. Ltd. - Kirkintilloch, Glasgow (previously LF) LK W. & T. Lock LN Lissen Ltd. LP Lindsay, Parkinson & Co. Ltd. LR Thomas De La Rue LS Lang & Squire Ltd. LUS Lustraphone Ltd. LWA Lightwood & Son - Birmingham
M (originally) P.O. Factory, St Johns Road, Dublin (derived from the Irish word for factory ‘Monarca’) M (later) W. Maxwell & Co. Ltd. MA Males & Andrews MCA P. McAinch Ltd. MD B.D. & Co. (Edward A. Boynton) ME F.W. Male & Son Ltd. MF Walter Macfarlane & Co. - Glasgow (later MFA) MFA Walter Macfarlane & Co. - Glasgow (previously MF) MH A.G. Matthews MK Marconi Scientific Instrument Co. ML C.A. Middleton Ltd. MM The Condenser & Electric Co. (originally) MM Murphy Radio Ltd - Welwyn Garden City, Herts. (later) MN Metropolitan Vickers Electrical Co. Ltd. MOV M.O. Valve Co. Ltd - London W6 MP Moulded Products Ltd. MRL McMichael Ltd. MS Mead Ltd (originally) MS McDowell Steven & Co. - Falkirk (afterwards, later MSL) MT Moore & Wright Ltd. MTW Modern Telephones Ltd - Wimbledon, London SW19 MTJO Mullard Ltd - London WC1 MTC Millars' Timber & Trading Co. Ltd. MU Murray (c/o Reid Bros., see R) MV Mullard Radio Valve Co. Ltd. MW Micklewright Ltd. MWB Marconi Wireless Telegraph Co. - Basildon, Essex MXB Motorola - Basingstoke, Hants.
N Nalder Bros. NB Newton Bros (Derby) Ltd. NE North of England School Furnishing Co. NJ British Nigerian Timber Co. NS Neill, Small & Sons NTS The Norton Boys' Home NW Norwest Construction Co. Ltd.
O Gent & Co. (later OAA) OAA Gent & Co. - Leicester (previously O) OD D.M. Davies OE unknown OM Oldham & Son
P R.W. Paul Ltd PA
Parkes, Samuel
& Co. Ltd. PBI Plessey – Ballynahinch, N. Ireland PC H.M. Prison Commission PCB Plessey - Whiteside Works, Bathgate, West Lothian (see PLF) PE The Power Equipment Co. Ltd. PEH Pye - Hastings PER Plessey Electrical Equipment Division - Romford, Essex PG The Pitter Gauge & Precision Tool Co. PGH Pirelli - Eastleigh, Hants. PGL Pirelli - Southampton PH W.G. Pye & Co. Not actually part of PYE Group after the sale of PYE Radio to C. O. Stanley, it was a separate company producing Scientific Instruments PK Chas. Peacock & Co. Ltd. PL The Plessey Co. Ltd. - Ilford, Essex (later PLA) PLA Plessey - Ilford, Essex ( also TLA, previously PL) PLF Plessey - Whiteside Works, Bathgate, West Lothian PLS Plessey - Kemberry Rd, Swindon, Wilts. PLJ Plessey - Upminster, Essex PLV Plessey - Havant, Hants. PLW Plessey - Cheney Manor, Swindon, Wilts. PLX Plessey - Newport, Gwent PLY
Plessey - Titchfield PM Reliance Telephone Co. Ltd - Birmingham PMC A.T.E. (Wigan) Ltd - Pioneer Works, Wigan, Lancs. (see PML) PML A.T.E. Ltd - Chorley, Lancs. PN Radio, Phonopore and Electricals Ltd. PR The Premier Accumulator Co. (1921) Ltd. PS The Parkside Engineering Co. Ltd. PSD Plessey - Dublin, Ireland PSL Poulton Selfe & Lee Ltd - Wickford, Essex PTB Pye Thermal Bonders PTE Pye Telecommunications Ltd - Ekco Works, Southend, Essex (see KKA) PTL Pye Telecommunications Ltd - PTL was the designation of PYE, Ditton works, Newmarket Road, Cambridge. Later it was St Andrews Road new Factory which replaced Ditton Works and Quy Mill research centre. PW Palmer & Waumsley PX Phoenix Telephones & Electrical Works Ltd. - London NW9 (later PXA) PXA Phoenix Telephones & Electrical Ltd. - London NW9 (formerly PX) PYE Pye Telecommunications. Ltd. - Cambridge (see CWL) PYI Pye Radio Ltd. - Cambridge PYL Pye Radio Ltd. - Leicester PYT Plessey - Taplow, Maidenhead, Berks. PZ Pritchett & Gold and E.P.S. Co. Ltd.
R Reid Bros. RA Radio Instruments Ltd. RAA Landis & Gyr (formerly Aeronautical & General) RAW Roberts & Armstrong (Engineers) Ltd - Wembley, Middx. RBA Reid Brothers (Same as W Reid & Co.?) RC Ross, Courtney & Co. RD W. & M. Richmond & Co. RE Reliable Engineering Co. RF Royal Gun & Carriage Factories RH Ruston & Hornsby Ltd. RIA Rathdown Industries Ltd - Ascot, Berks. RLA Ryford Ltd - Aldridge, Staffs. RLE Ripaults Ltd - Enfield, Middx. RML Rotheroe & Mitchell Ltd - Greenford, Middx. RNA Radio, Phonopore & Electricals Ltd (Sterling took over) RR R. Robertson RS Radio Supplies RT Robert Edwards RTL Racal Transcom Ltd - Salisbury, Wilts. RTN Reliance Telephone Co. Ltd - Birmingham RV Revo Electric Co. Ltd.
S Siemens Bros. & Co. Ltd. - Woolwich, London SE15 (later SEG) SA The Saunders Electrical Co. SAV W. Bryan Savage SB S.G. Brown Ltd. SBD Stonebridge Electrical Co. Ltd. SBM Salford Electrical Instruments - Manchester SC L.C. Smith & Corona Typewriters Ltd. SCP Surrey Concrete Products Ltd. SD S. Davall & Sons SE Small Electric Motors Ltd. SEA Siemens-Edison Swan - London N17 (became part of AEI) SEC Salford Electrical Instruments - Heywood, Lancs. (part of GEC) SEG AEI Ltd - Woolwich, London SE18 (ex Siemens, see S) SER AEI Ltd - West Hartlepool, Co. Durham (ex Siemens) SEW Siemens Edison Swan - Woolwich, London SE15 (see SEA) SF Scofield & Flexton SFC Standard Fuse Co. SG G. Salter & Co. Ltd. SID Salmon Industries Ltd - Northern Ireland SL S.G. Leach & Co. Ltd. SLW Speke Telephones Ltd - Wilmslow, Middx. (see SPK) SM Stuart & Moore (taken over by G. Longfield-Beasley) SN Solidite & Synthetic Mouldings Ltd. SP Small Power Dynamo & Motor Co. Ltd. SPK Plessey - Speke, Liverpool (ex Speke Telephones Ltd., see SLW) SR Estler Bros. SS Ebonestos Insulators Ltd. SSA Ebonestos Industries Ltd - London SE15 (previously SS) SSG Splintex Safety Glass Co - London W7 SSL Siemens-Schuckert (Gt. Britain) Ltd. SSS S. Smith & Sons (Motor Accessories) Ltd. SSS Smith's Industrial Instruments Ltd - London NW1 ST Stuart Turner Ltd. STC
STC - New Southgate, London N11 STD STC - Footscray STE
STC (Valve Division) - Paignton, Devon STJ
STC- Harlow STK STC – Boreham Wood STM
STC - Monkstown, N. Ireland STO
STC – East Kilbride STU
STC – Enfield STW STC - Taunton SU The Educational Supply Association Ltd. SUE Submarine Cables Ltd - Erith, Kent SUG Submarine Cables Ltd - Greenwich, London SE3 (see DJA and S) SUR Siemens Halske - Germany SV D.G. Somerville & Co. Ltd. SY H.C. Slingsby
T Tyer & Co. TA Thermega Ltd. TB Turner Bros. Ltd. TBE Telerelays Sales Ltd -Braintree, Essex TCC Telegraph Condenser Co. TCD Telephone Cables Ltd - Dagenham, Essex TCE STC - Enniskillen, N. Ireland TCH
STC - Larne, N. Ireland TCJ STC – Jenny Mount (Belfast), N. Ireland TCL Trent Concrete Ltd. TCON
Team Concepts International Ltd (Hong Kong) TCT
STC – Treforest TCW
STC – Rhyl TCS STC – Chase Side TD H.J. Townsend TE Telephone Manufacturing Company (formed 1915, later TEA) TEA TMC - Dulwich, London SE21 TES TMC - St Mary Cray, Kent (from 1939) TEW TMC - Winsford, Cheshire TF Timber Fireproofing Co. Ltd. TG Tungstone Accumulator Co. Ltd. TGR Thorn Ericsson - Rochester, Kent TGW Thorn Ericsson - Scunthorpe TH The British Thomson-Houston Co. TK The Bradford Patent Truck & Trolley Co. TL
Eastern
Telegraph Co. Ltd. TLA Plessey - Ilford, Essex (also PLA) TM Telephone & Microphone Co. TMA TMC - Airdrie, Lanarkshire (see GNA) TMC Telephone & Microphone Co. TMK TMC - King's Lynn, Norfolk TM TMC - Malmesbury, Wilts. TN J.W. Thomson TP Thornton Pickard Manfg. Co. TPC TMC Transmission Division - St. Mary Cray, Kent TR Ernest Turner Electrical Instruments Ltd. - High Wycombe (later TPA) TRA Ernest Turner Electrical Instruments Ltd. - High Wycombe (formerly TR) TS The Thames Manfg. Co. Ltd. TSD Telephone Supplies Ltd - Aycliff, Co. Durham TT Taylor, Tunnicliffe & Co. Ltd. TTC Taylor Tunnicliffe & Co. Ltd. - Lastwood, Hanley, Staffs. TTH TMC - Canterbury, Kent TTL TMC - Livingstone, Bathgate, West Lothian (from 1969) TU The Tudor Accumulator Co. Ltd. TW Tate & Wilkinson TY H. Tinsley & Co. TYA H. Tinsley & Co.
U Walters & Co. UAA Walters Electrical Manufacturing Co. Ltd - London (previously U) UG United Woodworking Co. Ltd. UME Multitone Ltd. UW Underwood Portable Typewriters Ltd.
V T. Watson VA The Varley Magnet Co. VD The Ever Ready Co. (Gt. Britain) Ltd. VG Evershed & Vignoles Ltd. - London W4. Later VGA VGA Evershed & Vignoles Ltd. - London W4 (previously VG) VK Vickers Ltd. VLC Varta Ltd - Crewkerne, Somerset VN Vanesta Ltd. VS Evans Bros. Ltd. VTS Venner Time Switches - New Malden, Surrey VV C.A. Vandervell & Co. Ltd. VW Visible Writing Machine Co. Ltd.
W STC - North Woolwich, London (Western Electric pre-1925, see WAA) WAA STC - North Woolwich, London E WAB STC - Newport, S. Wales WAE
STC - Basildon, Essex WAF STC - Southampton WAS STC - Southampton WB Westinghouse Brake & Saxby Signal Co. Ltd. WC Walsall Conduits Ltd. WEA Weatherlite Ltd. WEE W.E. Eaton WER Whiteley Electrical Radio - Mansfield, Notts. WF W.H. Foster & Sons Ltd. WG Ward & Goldstone Ltd. WH Wm. White & Co. WI Webb & Wells - Ilford, Essex WJ Walter Jones & Co. Ltd. WK L. Weekes Ltd. WS M.W. Woods WW The Wilson Wolf Engineering Co. Ltd.
X Wilcox
YA British Army line stores prefix (not a BPO manufacturer code)
Z Negretti & Zambra Ltd. Z Found near a screw terminal - means Zinc and is the negative pole of a primary battery ZA British Army wireless stores (not a BPO manufacturer code) ZEA Zenith Watch Co. Ltd (GB) (Previously ZE) ZE Zenith Watch. Co. Ltd. *Gt. Britain) Moulding
marks BLD or BLtd Birkby's of Liversedge (W. Yorks.), the plastics moulding division of Plessey. C GEC Ltd (Telephone Works, Coventry) G GEC Ltd LR Thomas De La Rue Ltd, MPL Moulded Products Ltd S
Siemens Brothers Ltd. Title numbers All BPO telephone sets (also equipment large and small) carried a ‘title number’, in which table telephones, portable telephones and piece parts such as handsets carried even numbers whilst wall telephones had odd numbers. Special and experimental telephones had numbers prefixed SA (Subscribers’ Apparatus), whilst designs inherited from the former National Telephone Company were prefixed NT. As well as the title number, telephones normally carried a mark number and
the date of manufacture. The original design is known as Mark 1, the first
modification as Mark 2 and the second as Mark 3 (and so on). Earlier on original
designs and modifications were identified by three digits, starting with 234,
for the original design, then 235 for the first modification, 236 for the second
modification and so on. Examples: Telephone 162 C34/1 indicates title number 162, made by GEC in 1934 to the Mark 1 design. Under the older scheme of marking this would have been shown as C34
No. 162 Moulded items carried a letters and number code in which the upper two letters indicated the item manufacturer, the lower two letters the moulding subcontractor and the numeral the type of moulding material. Non-BPO codes
British Codes Australian
PMG manufacturer codes New Zealand |
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Last revised: January 09, 2011FM |