Wall telephone, with integral bell, that's very much like the Siemens Brothers 366.

When opening the case, release the two screws on the front cover and then pull them towards you are far as they will go.  They will not come out completely but if you do not pull them towards you then they will catch on the casing as the cover is swung open.  When closing the case it is also important to ensure the screws are pulled out.

Front view Internal view - with case hinged to left

Wiring a new style BT cord to a phone with diagram L530315A

  1. Remove the wire strap and replace with a 3.3k resistor between terminal's 1 and E in the Bellset.
  2. Wire White of the line cord to terminal 1 of the Bellset.
  3. Wire Red of the line cord to terminal 4 of the Bellset.
  4. Wire Blue of the line cord to terminal 3 of the Bellset.
  5. Wire Green of the line cord to terminal 2 of the Bellset.
  6. Disconnect the blue wire from the capacitor.


Additional Pictures

Earlier model shown above - identifiable by the square capacitor
(The dial cord is a modern plastic variant)


Straight from the skip - thanks to Dave Dockerill for the pictures


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Last revised: May 24, 2021