I bought these on eBay. The seller claims he knows the person who removed them from a '56 Goldtop to do a humbucker conversion. Of course, sellers on eBay say all sorts of things.
There are no markings or numbers on the pickups themselves. Inside the neck pickup cover is the number UC-452-F, and opposite that is a number 1. Inside the bridge pickup cover is the number UC-452-B, and opposite that the number 2.
I thought I'd post some pics here, and folks can see what they think. Genuine, or...?
Click on the pics for a bigger version.