Sweet PST, EMZ
Mid 80's, US PAT..., hollow rivets, Japan made PST
That is a Japan made PST (JPST) for sure.Are the rivets hollow on the other side?If so then it could be one of the very first outsourced to Japan I guess Edit: wowaboto beat me to it
All the big font LM that I have ever seen are from Japan as well as the riveted ones Nice find
Interesting It's not just a bit of rust/oxiidisation is it?