k5dh wrote:
I've never heard of such a thing. Typical aircrew interphone mics had a built-in push-to-talk switch, so there would be no need for an external one. Look at the physical size of the item, too. That device is several inches long, which would be huge and impractical for the alleged use. That big mounting bracket implies that the unit was hard-mounted somewhere, making it even more impractical. The dead giveaway here is that the connectors on the cables (which are plugged into each other) are BNC type, which did not exist during WW2. The concept originated in 1945 and the patent on the design was issued in 1951. The eBay item looks like a case of someone having no clue about what they have, and they're just trolling for a sucker.
Mics would be awkward during combat. You just had to reach down and push the button on the SW-141 that was hanging from your neck. No need to reach over to the wall for a mic that may or may not be where it was suppose to be. SW-141's were pretty standard equipment for bomber crews in WWII. Pilots had the throat mics and push to talk on the yoke, but most other stations in combat used the switch hanging around their neck.
That said, and having been a Curator of Costumes at NEAM years ago, I've never seen the one in question, only the SW-141 type.
Jerry