Earpiece No. 1
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.
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Earpiece No. 2
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.
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Earpiece No. 4 For
Receiver, Bell, No. 4A, original American type.
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Earpiece No. 5 For
Receiver, Head Gear No. 4E (mark 234) and Telephone, No.
28 (old type).
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Earpiece No. 9 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).
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Earpiece No. 10
Should only be used with a Receiver, Watch No's 3D
& 4D and a Diaphragm No. 12.
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Earpiece No. 11
For Receiver, Headgear, No. 5F.
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Earpiece No. 12
For Telephone, No. 28.
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Earpiece No. 13
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. |
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Earpiece No. 14
For Telephone, No. 28 (mark 237).
Plain earpiece, ebonite only, fixed by metal clamping
ring.
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Earpiece No. 16
For Receiver, Head Gear, No. 8A.
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Earpiece No. 17 Should only be used with a Receiver and Condensers,
Headgear No's 1A & F and a Diaphragm No. 24.
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Earpiece No. 18
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Superseded by Earpiece No. 23.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.
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Earpiece No. 22
Used with a Receiver Headgear No. 10
with Diaphragm No. 25 and Receivers, Watch No.7P.
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Earpiece No. 23
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.
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Earpiece No. 26A
Plastic screw on earpiece used on Handset No.
3 (fit most 700 type telephones).
Superseded by Earpiece No. 29A.
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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.
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Last revised:
June 24, 2021
FM
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