Just got a set, anybody know anything about these? I'd never thought about it until I saw these for sale. Checked Prodger's helmet book (pg. 226), and lo and behold there they are, main recognition feature being that when installed, the two screws on the outside of the case align in the horizontal vs. in the vertical like RAF receivers.
Interesting construction, sort of a hybrid of the early B type receivers and the later, more common style (eg. 10A/13466) the RAF used. Two screws attach the outer case to the innards but the inside cap screws off (like a B type receiver) as well.
Ref. No. stamping is centralized on the exterior between the screws and reads:
There is also an ink stamp on the outside that reads T-3 and patent years are stamped on the guts of it. Years read 1925, 1927, and 1935. The innards are totally different than RAF receivers.
They fill out the leather domes on my green cotton RCAF helmet (pg. 227
) quite nicely!
Outside of case
Outside casing removed
Now then, anyone know where I can find an RCAF wiring loom to finish this set off?