Standard CBS No. 1 wall telephone with no magneto generator.

Wooden Local Battery telephone with sloping writing shelf.

The set shown to the right was made by Ericsson.

A later version was made, the Mark 238, which was oblong in shape (see pictures below).

This telephone was in the 1928 Rate book but not available in the 1946 Rate Book.

Fitted with a Transmitter No. 2 although earlier types had a Transmitter No. 6.

This telephone could also work on CBS No. 2 & 3 exchanges by the addition of a capacitor.

Superseded Telephone No. 15 if used with a Bellset No. 7.

Telephone No. 11 was the magneto equivalent.

Telephone includes (1928):-
1 x Bell No. 1A, unmounted. (Earlier types had Bells No. 9A).
1 x Coil, Induction, No. 1 (Earlier types) or No. 12 (Mark 238).
4 x Cords, Instrument, No. 1/16E, Black, 12".
1 x Cord, Instrument, No. 2/22B, Brown, 33".
1 x Frame, Notice, No. 1 (Earlier types had Frame, notice, No. 2, and Label No. 53B) .
1 x Glass No. 3.
1 x Hook, Receiver, F.
1 x Transmitter No. 2. (Earlier types had Transmitter No. 6).
1 x Mouthpiece No. 16.
1 x Receiver, Bell, No. 2 (Earlier types) or No. 1A (Mark 238).
4 x Fixing screws.

Frames, notice, No. 2, and Labels No. 53B, will not be maintained in the old type of these instruments.

Circuit diagram - N103.

Drawing No's 8830, 8831 & 8832.

Supplied by Ericsson, their Model N20141

GPO instructions state that this telephone should be fixed to the wall with it's lower edge 36 inches from the floor.

Later version, the Mark 238
Inside the telephone - the silver cylindrical object, to the right,
is a modern style capacitor
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Last revised: February 05, 2020