Type 766/8766 Push Button Trimphone
A loop dialling keypad version of the Trimphone was introduced in 1976 as the 766. The Trimphones were all fitted with a tone ringer which initially warbled quietly and then louder. With the advent of new style wiring the model numbers were prefixed with an '8' and were fitted with a 4000Ω high impedance ringer and a new style line cord fitted with a 431A plug. In 1982 the final incarnation of the Trimphone was relaunched with a new set of colours known as The Snowdon Collection.
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8766 Snowdon Collection Trimphone in brown & cream
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8766 Snowdon Collection Trimphone in two tone red
Read more about this topic: GPO Telephones
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