Wireless receiver, crystal

Crystal wireless receiver, type C form A made by the British Thomson-Houston Co. of Coventry, with variometer tuning, two switchable crystal detectors, a condenser, and in a polished wood box

Wireless receiver, crystal

Crystal wireless receiving set made in Great Britain, with the brand name Midge and Post Office approval number 902

Wireless receiver, crystal

Crystal wireless receiver made by Perophone Ltd of London