The 300 series phone was introduced in the 1930's and was the standard instrument fitted by the GPO between the 30's and 60's with the radical development of its own internal bell!! This superb example of British telephone engineering has established itself as a design icon and is still seen in many period dramas & films and DEAL or NO DEAL.The distinctive "Dring Dring" of the mechanical bell ouses nostalgia as one of the most recognised sounds of the 20th.
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