Electro-optic identifiction code system in a timepiece

摘要: A combination timepiece and electro-optic identification code device employs elements of the timekeeping display has a programmable read only memory (PROM) storing number codes with means for selecting transmitting it from via an portion on to opto-electronic reader placed in proximity timepiece. The selected may be unique itself, by user, machine-readable representative time, or any above codes.