I got to a radio flea market this yesterday. Bought a bunch of old components, plus a board with some metal can transistors. I was hoping to find a jfet or something, but it seems those are just some regular bjts.
I also saw components that I've never seen before: half-bridge rectifiers (or dual diodes in series). There are like a normal diode bridge, but half of it, and only three pins. I saw part numbers such as OF475 (from Phillips) and V15C250. They are small, comparable to IR 10DC-1R (which is easy to find on the Internet). Can't find anything on the Internet about them. I don't think they have any special properties, so no big deal, but curious why I can't find any info about them. Sadly, I didn't take a picture.