EARPIECES


 
 
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.
 


Earpiece No. 2

Should only be used with a Receiver Bell No. 1A marks C, D & 4001 and a Diaphragm No. 12 or a Receiver Bell No. 1A mark 4A and Diaphragm No. 12.
This Earpiece had a 'cutout' to hear the howler, if the earpiece was left off the phone.
 


Earpiece No. 9

Should only be used with a Receiver H.G. NT16 and a Diaphragm No. 18.
 


Earpiece No. 10

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


Earpiece No. 13
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Superseded by Earpiece No. 23.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 and a Diaphragm No. 12.

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


 
Earpiece No. 22

Should only be used with a Receiver Headgear No. 10 and a Diaphragm No. 25.
 


Earpiece No. 23

Identified by the recessed "pepper pot" centre.

Should only be used with a Receiver Inset No. 2P and 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Superseded by Earpiece No. 29A.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 21, 2010

FM