About The Model 300 Series
The GPO 300 series telephones were produced between 1937 and 1968, though they remained a staple of British households and offices well into the 1960s and 70s. Many featured the iconic "cheese drawer" at the base for pull-out instruction cards. The 332 was a more advanced unit that didn’t require a separate external bell box. By 1937 the phone was in full production in Britain. Although the BPO initially stayed with black, other colors were later made available with the introduction of Imperial Chemical Industries' methylmethacrylate, tradenamed Diakon. The colours decided on were Lacquer Red, Ivory, and Jade Green.