EARPIECES

Should only be used with a Receiver Bell No. 1A mark B and a Diaphragm No. 9 or a Receiver Bell No. 1A mark NT10 and Diaphragm No. 19.

Used with:-
Receiver Bell No. 1A (marks C, D & 4001), 2B or 4A (mark 234) and a Diaphragm No. 12 or a Receiver Bell No. 1A mark 4A and Diaphragm No. 12.
Receivers, N.T. No.16 (mark 234).
Receivers, Watch, No's 1B (marks B, D, and 234) or 2B.
Telephones, No's 28 (marks 234, 235 and 237), 78, 86 or 94.
This Earpiece had a 'cutout' to hear the howler, if the earpiece was left off the phone.

For Receiver, Bell, No. 4A, original American type.

For Receiver, Head Gear No. 4E (mark 234) and Telephone, No. 28 (old type).

Used with:-
Receiver, Head Gear NT16 and Diaphragm No. 18.
Receivers, N.T. No. 1, 2, 3, 5, 6, 9 or 12.
Receivers, Watch, No. 1B (Mark NT 12).
Microtelephone, Hand, N.T. No. 1.
Telephone Nos. 28 (Mark NT 2 and NT 3), 30 or 38 (Mark NT 5).

Should only be used with a Receiver, Watch No's 3D & 4D and a Diaphragm No. 12.

For Receiver, Headgear, No. 5F.

For Telephone, No. 28.

For Receivers, H.G., Nos. 1 each and 3, Telephone. Nos. 36, 80 and 140, certain Telephones. No. 28 and certain Receivers, Watch.

20 threads per inch, B.S.W.

For Telephone, No. 28 (mark 237).

Plain earpiece, ebonite only, fixed by metal clamping ring.

For Receiver, Head Gear, No. 8A.

Should only be used with a Receiver and Condensers, Headgear No's 1A & F and a Diaphragm No. 24.

Early style earpiece fitted on most Bakelite handsets.

Superseded by Earpiece No. 23.

Should only be used with a Receiver, Inset No. 1L or Receiver, Watch No.6L with a Diaphragm No. 12.

Colours:- Black, Chinese Red, Ivory and Jade Green.

Used with a Receiver Headgear No. 10 with Diaphragm No. 25 and Receivers, Watch No.7P.

Identified by the recessed "pepper pot" centre.

Should only be used with a Receiver, Inset No. 2P with  a Diaphragm No. 25.

Colours:- Black, Chinese Red, Ivory and Jade Green.

Plastic screw on earpiece used on Handset No. 3  (fit most 700 type telephones).

Superseded by Earpiece No. 29A.

Introduced in mid 1981 this is an Earpiece No. 26 modified to comply with with high voltage requirements for telephones detailed in POR 1065 ABS material.