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History of the manufacturer  

Hammond, Richmond, Surrey

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Name: Hammond, Richmond, Surrey    (GB)  
Abbreviation: hammond

Hammond; The Arcade, George Street, Richmond, Surrey.

Hammophone crystal set.

This manufacturer was suggested by Konrad Birkner † 12.08.2014.

Some models:
Country Year Name 1st Tube Notes
GB  22 unnamed   Appears to be an early version of the Hammophone. Panel is not engraved, captions on wh... 
GB  23/24 Hammophone   BBC/PMG stamp, GPO No.748;