Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 137,397 pages of information and 221,173 images on early companies, their products and the people who designed and built them.
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