Made for British Admiralty. 4-way plug on end is similar to standard B.P.O. operator's plug. Headphones labelled "10A/12443 (2 phones). Microphone labelled "10A/1257" with ON/OFF switch. It is possible the 2 items are not matched as they were found lose and separated in a box of "junk".
Note: Unless these phones have military or radio significance, they may be of doubtful value - needs research.
Processed Material/Metal
Processed Material/Textile
Processed Material/Synthetic/Plastic/Bakelite
Signature/Marks and Type
AM / 10A/12443 Embossed
10A/12570 Impressed
Accession No
Credit Line
Headphone/Microphone Set, F160.2001. The Museum of Transport and Technology (MOTAT).

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