Re: Just bought another 300-series 'phone...
The handset it the usual type 164 dated 1948, fitted with the later Receiver Inset No. 2P (maybe the Mk.3 introduced c. 1949), Earpiece No. 23 and Diaphragm No. 25 along with a transmitter Inset No. 10 with Mouthpiece No. 15.
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