STC TRIMPHONE PROTOTYPES


These pictures are of an STC Trimphone, which looks like it is dated 1966.  This is possibly a prototype of the GPO Telephone No. 712 but is 66 the date, as the three hole casing was superseded by a single case fixing in 1966.

No other information is available.

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STC prototype telephones

 

 
 
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Last revised: April 25, 2012

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