BRITISH ERICSSON (ETL)
DIALS

Incomplete

Dial Type ETL Code Number Ring Finger plate Ratio Impulses/sec GPO Type
No. 8FA N4380 Non Director Stainless Steel 66.6/33.3 10 8FA
             
No. 10 N8381 Non Director Phosphor Bronze 66.6/33.3 10 10FA Mark 235
  N8381A Egypt Stainless Steel   10  
  N8381B Director Phosphor Bronze   10 10LA Mark 235
  N8381C Non Director Stainless Steel   10 10FA
  N8381D New Zealand (0-9) Stainless Steel 66.6/33.2 10  
  N8381E Non Director Stainless Steel 66.6/33.3 10 10LA Mark 236A
  N8381F Director Stainless Steel 66.6/33.3 10 10LA Mark 4A
  N8381H Non Director Stainless Steel 66.6/33.3 10 10LA Mark 4A
  N8381J War Time Substitutes Stainless Steel      
  N8381K War Time Substitutes Stainless Steel      
  N8381M Australia Stainless Steel   10 10FA
  N8381P Non Director Moulded   10 10FA
  N8381Q Egypt Moulded   10 10LA
  N8381R Non Director Moulded   10 10FA
  N8381S Chinese Stainless Steel 66.6/33.3 10  
  N8381U Chinese Moulded 66.6/33.3 10  
  N8381W Director Moulded   10 10LA
             
No. 12 N4383A Non Director Stainless Steel 66.6/33.3 10 12FA
  N4383A1T Non Director Stainless Steel 66.6/33.3 10 12FA
  N4383B Director Stainless Steel 66.6/33.3 10 12LA
  N4383B5 Director Stainless Steel 66.6/33.3 10 12LA (Tele Rentals)
  N4383F2T Chaplets Stainless Steel 66.6/33.3 10 12
  N4383K1 Chaplets Stainless Steel 66.6/33.3 10 12 (Tele Rentals)
             
No.14 N4383B6 Director Stainless Steel 66.6/33.3 10 14LA
             
No. 21 N4394A2A Director Moulded 66.6/33.3 10 Black
  N4394AA11A Chaplets Moulded 66.6/33.3 10 Black
  N4394BA12A Chaplets Moulded 66.6/33.3 10 Ivory
  N4394CA13A Chaplets Moulded 66.6/33.3 10 Red
  N4394DA14A Chaplets Moulded 66.6/33.3 10 Yellow
  N4394EA15A Chaplets Moulded 66.6/33.3 10 Blue
  N4394JA16A Chaplets Moulded 66.6/33.3 10 Grey
  N4394KA17A Chaplets Moulded 66.6/33.3 10 Green
             
  N4394M1A Non Director Stainless Steel 66.6/33.3 10  
  N4394M1B Non Director Stainless Steel 60/40 10  
  N4394M1D Non Director Stainless Steel 61.5/38.5 10  
  N4394M1H Non Director Stainless Steel 66.6/33/3 10  
  N4394M1K Non Director Stainless Steel 66.6/33.3 20  
  N4394M2A Director Stainless Steel 66.6/33.3 10  
  N4394M3A New Zealand (0-9) Stainless Steel 66.6/33.3 10  
  N4394M5A Egyptian & English Stainless Steel 66.6/33.3 10  
  N4394M5B Egyptian & English Stainless Steel 60/40 10  
  N4394M5C Egyptian & English Stainless Steel 60/40 8 to 9  
  N4394M6A Chinese & English Stainless Steel 66.6/33.3 10  
  N4394M10A Canadian Director Stainless Steel 66.6/33.3 10  
  N4394M20A Chaplets Stainless Steel 66.6/33.3 10  
  N4394M20B Chaplets Stainless Steel 60/40 10  
  N4394M20C Chaplets Stainless Steel 60/40 8 to 9  
  N4394M20D Chaplets Stainless Steel 61.5/38.5 10  
  N4394M27A Non Director Stainless Steel 66.6/33.3 10  
             
  N4394QB2A Director Stainless Steel 66.6/33.3   Used on N238A1T
             
  N4394S1A Non Director Transparent 66.6/33.3 10 21FA
  N4394SA1A Non Director Transparent 66.6/33.3 10  
  N4394S1B Non Director Transparent 60/40 10  
  N4394SD Non Director Transparent 61.5/38.5 10  
  N4394SH Non Director Transparent 66.6/33.3 10  
  N4394SJ Non Director Transparent 66.6/33.3 10 to 11  
  N4394S2A Director Transparent 66.6/33.3 10 21LA
  N4394SA2A Director Transparent 66.6/33.3 10  
  N4394SA2H Director Transparent 66.6/33.3 10  
  N4394SA2J Director Transparent 66.6/33.3 10 to 11  
  N4394S3A New Zealand (0-9) Transparent 66.6/33.3 10  
  N4394SA3A New Zealand (0-9) Transparent 66.6/33.3 10  
  N4394SA3AR New Zealand (0-9) Transparent 66.6/33.3 10  
  N4394S5A Egyptian & English Transparent 66.6/33.3 10  
  N4394SA5B Egyptian & English Transparent 60/40 10  
  N4394SA5C Egyptian & English Transparent 60/40 8 to 9  
  N4394S6A Chinese & English Transparent 66.6/33.3 10  
  N4394S10A Canadian Director Transparent 66.6/33.3 10  
  N4394S20A Chaplets Transparent 66.6/33.3 10 21CA
  N4394SA20A Chaplets Transparent 66.6/33.3 10  
  N4394SA20AR Chaplets Transparent 66.6/33.3 10  
  N4394SA20B Chaplets Transparent 66.6/33.3 10  
  N4394SA20D Chaplets Transparent 61.5/38.5 10  
  N4394SA27A Non Director Transparent 66.6/33.3 10  
             

Later dials using Plessey Part Numbers

The main part number is 408/1/30060/XXX where the suffix XXX is broken down into 3 digits.  For example, using the tables below, a dial 408/1/30060/050 would be a dial with a N121354A finger plate, a Libyan Number plate and a ratio of 2:1.

This part number covers Post Office Dial type No's 21FA, 1/21FA, 21FA Steel and all tropical dials.

1st Digit of XXX

1st Digit Finger Plate Spring set Spring
0 N121354A 408/1/50843/000 N114131
1 N113885A10 408/1/50843/000 N114131
2 N12581 408/1/50843/000 N114131
3 N121354A 408/1/30053/000 N114131
4 N113885A10 408/1/30053/000 N114131
5 N12581 408/1/30053/000 N114131
6 N121354A 408/1/50843/000 N118677

2nd Digit of XXX

2nd Digit Number Plate
0 Non Director
1 New Zealand
2 Egyptian & English
3 Chinese & English
4 Canadian
5 Libyan
6 Silver Gilt with Chaplets
7 Non Director with Special Oil No. 2
8 Persia
9 India

3rd Digit of XXX

3rd Digit Ratio F.P.S. Speed
0 2:1 10
1 1.5:1 10
2 1.5:1 8 to 9
3 1.6:1 10
4 4:1 11.5
5 1:1 11.5
6 64.6 to 68.6 break 10
7 2:3 10 to 11
8 2:1 20
9 66 to 68 break 12

 
 
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Last revised: January 11, 2022

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