Rob,
Yes it's a 21FB CRT, and a pair of 3DG4 rectifiers. One is bad it arcs every now and then, just haven't been able to find one yet.
Just have to decide if I want to restore it, sell it, or keep it. I really don't have the room, but I still keep buying.
Same auction I brought home an RCA 6T54, for $2 I couldn't leave it. I forgot to load up the base unit when I left, luckily the auctioneer is going to be in my area the end of June and will bring it with him saves me a 3 hour drive.
Chuck