I would have to agree 100% here, and I like this idea a lot.

Not really knowing how old of a Wingmaster you are looking to find with interchangeable choke tubes, the above option is likely the best if you enjoy the craftsmanship of the older Wingmaster. I'm not quite sure when Wingmaster came out with interchangeable chokes for their barrels, but I do know they have them. I own 5 Remington 870's. 2 of which are express magnums and they both have interchangeable chokes. I also own 3 older Wingmasters, none of them have interchangeable chokes. But they are all manufactured before 1962. My oldest Wingmaster is a second year (1951) production. All 3 of my Wingmasters have the tootsie roll forearm, they don't have the fancy checkering of Fleur De Li pattern or any ribbons. If thats what you mean by "old" Wingmaster, then I doubt you will find any Wingmaster from that era with factory interchangeable chokes.