I'm surprised that there is no model and serial number tag. You think that would be manufacturing 101.
Beseler's a little odd about that - when they upgraded the 4x5 MX to MXT, it was just a replacement lens stage, and they never made a new sticker for the frame, so they all seem to say "MX". On my 67c, it was slikscreened on the side of the condenser head.
BTW, the 67c could take that same color head, it just slid on with two mounting knobs. If the lens stage is the same, I was able to pin-register mine for masking. They didn't make a glass carrier for that model but I ghetto'd one up as well.
It's not the most alignable enlarger out there, but I made a DIY Besalign lens board for it and got perfect prints - biggest I went to was about 18x27. If you look at photos of a Besalign board and own a drill press, they're easy to make - you need a drill bit and tap for like an M6 screw, and three screws with thumbscrew-style ends. Those are tiny boards so it's a tight fit but can be done and 100% worth it for larger prints - even 11x14 might benefit.
Also, the Printmaker 35 lens boards and neg carriers were the same for my 67c. I've since passed it on to a kid and got the big 45, but it did good work.