EARPIECES


 
Earpiece No. 1

Earpiece made of Bakelite.

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.

Drawing - 10056.

 


Earpiece No. 2

Earpiece made of Bakelite.

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' or "dimple" on the raised outer edge, to hear the howler if the receiver was left off the phone and placed earpiece down.

Drawings - 10001 and 62955.

 


Earpiece No. 4

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

 

 
Earpiece No. 5

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

 

 
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).

Drawings - 10110 and 62956.

 


Earpiece No. 10

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

 


Earpiece No. 11

For Receiver, Headgear, No. 5F.

 

 
Earpiece No. 12

For Telephone, No. 28.

Drawing - 10103.

 

 
Earpiece No. 13

Used with Receivers, Headgear 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.

Drawing - 62955.

Earpiece No. 14

For Telephone, No. 28 (Mark 237).

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

 

 
Earpiece No. 16

For Receiver, Head Gear, No. 8A.

 

 
Earpiece No. 17

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

 


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Superseded by Earpiece No. 23.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.


 

Earpiece No. 22

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

 


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.




 

Earpiece No. 26A

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

Superseded by Earpiece No. 29A.

 


 

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: December 31, 2023

FM