TELEPHONE No. 75

This is a wall mounted telephone used on CBS No. 2 & 3 exchange systems.

Made for external use at cab ranks etc.

It is cased in Cast Iron and has a lockable door with an electro-magnetic catch, which unlocks the door on ringing.

The phone goes off hook, by the use of a spring plunger switch, which is operated when the door is opened.  It has a simple speech circuit with the receiver and transmitter in series.

Similar to Telephone No. 59 except that it had no magneto.

Secured with a Keys, Lock A.

These were sometimes used in cabinets and Kiosks No's 1 to 4,  and associated with a cash box.

Introduced circa 1915.

Superseded by Telephone No. 125.

Found in the 1915 and 1928 Rate Books.

Telephone included (1915 and 1928)
1 x Transmitter No. 1 (Mouthpiece No. 4).
1 x Receiver, Watch No. 1B.
1 x Hook, Receiver C.
1 x Bell No. 8A. or 53A (modified).
1 x Condenser M.C. 22.
1 x Key, Lock A.
2 x Protector G.
1 x Cord, Flexible No. 222, waterproof (Receiver).
2 x Cord, Flexible No. 116 (Transmitter cords).

Circuit diagram - N175.

Circuit diagram - CD 943.
 

Last revised: November 03, 2025