Converter Unit
DC/AC, No 1
No 2133
G.K.
Z.B 0013.

An inverter for powering the TypeX cipher machine when used in its mobile roles.
Interestingly the wooden case is marked Conveter Unit No '2'
the only date is on the voltmeter. Broad Arrow, 1943.

Louis Meulstees' wonderful series "Wireless for the Warrior" gives mention in Volume 2, W.S.19 page 87. Shown in the diagramtic reference of the Armoured Command Vehicle. See 'Seat C'.

Brent Bevan