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1904 William Gilbert James re-commenced business as Crypto Car and Cycle Co. of 14 Mortimer Street, London, principally making valves for i.c. engines
1917 The Crypto Car and Cycle Co of Mortimer St, Regent St, London, was advertising special engine valves; proprietor W. G. James
Presumably name changed to W. G. James
Some chance of confusion with Crypto Works Co