Remote control unit NO. ZA 29007
The remote unit (including key) was manufactured by PYE U.K. and were used on portable transmitter/receiver
WS62 by the British Commonwealth Countries Military, including South Africa, from 1940-1960.
ZA29007 is British ordnance number.

(thanks to Herman Willemsen for the update)

Remote control unit NO. ZA 29007

Remote control unit NO. ZA 29007

Remote control unit NO. ZA 29007