Vintage Breast Radio Transmitter Microphone.

I can’t find a comparison but I believe this was probably military origin.

I think it is probably Scandinavian and would appear to have been in use between the 60s and 70s.

The horn is missing but there appears to be an oxygen mask mic

I’m no expert in this field so you need to judge for yourself - what you see is what you get.

Please ask Any questions before buying.