Yup, I collected 3 genuine RM killswitches in the past few months on egay. NOS I got for $30 and a couple of others I picked around $4 each. Different to the PE type shown and not as rare but I have seen even the regular RM type sell for around $60us
I'm with you Tim, I bought 8, made in japan nos chrome switches for $4ea and I was going to use but then these other originals turned up
this is the oem RM/TM switch up to 1980. Some had a knurled cap some were plain polished alloy. some had a black rubber button and some red, some had an earth wire and some don't but this gives you the general idea of what the RM unit looks like