Thanks for all the replies. Yes LeedyBDP, it was a bargain. I got it for next to nothing.
I thought that it might be a Slingerland that someone changed the lugs on. Took off the top head (very tight) and inspected the snares and muffler. They look great and everything works smoothly. No sign of any markings or date stamp.
Black paint job seems to be original. I doubt I could wrap it and still get the heads on so I might strip the paint and refinish it.
It has the Slingerland push-button leg mounts and none of the floor tom legs I have fit. I seem to remember them taking the straight, smooth legs. I may modify them.
I had a cocktail kit before but I sold it after playing one gig balanced on my left leg all night. This one I'll probably hang on to as I have never seen a vintage one before.