Click here for STC Trimphone Prototypes

It is possible that these prototypes were designed to meet the GPO's call for a luxury boudoir telephone in the early 1960's.  The GPO chose the Trimphone and it released circa 1966 as the GPO Telephone No. 712.

proto1a.jpg (10947 bytes)proto1b.jpg (13234 bytes)proto2b.jpg (17732 bytes)

proto2a.jpg (14479 bytes)proto3a.jpg (12391 bytes)proto3b.jpg (18272 bytes)

proto4a.jpg (12761 bytes)proto4b.jpg (20065 bytes)

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Last revised: October 30, 2020