Mystery antenna mount

[Chris Suslowicz]

I'd agree that it's early WW2 (the later aerial bases had a screw-up clamp rather than a spring around the outside of the socket), and I don't think it's British.

If it's all-metal, then the only way it can work is if it sits on an insulator with a curved top (Ebonite?) and is fed from below through the vehicle roof. Aerial feeder would then be a cable to the threaded tensioner, but it must have been complicated to set up and keep working.

(The huge "Aerial Lead-in No.16" has a similar feed arrangement with a threaded stud, but is considerably more robust (and has a rubber base above the feed-through section to allow the aerial to flex/sway when the vehicle is moving.)

Are there any numbers stamped on it?

Chris.