Jimmy, I don't believe that you are correct in assuming that Simmons installed ribs on Model 12s for Winchester marketing. I think you are confusing this practice with the Model 42, on which Simmons did, in fact, install ribs for Winchester marketing. Most, if not all, Simmons installed ribs on Winchester marketed Model 42s were marked with Simmons logos. The reason that Winchester marketed vent rib Model 12s are not marked with Simmons logos is because Simmons did not install them. To answer your question about "who wants", such Winchester marketed Simmons marked guns are selling for thousands of dollars to collectors. As a matter of fact, Simmons marketed Model 42s are selling for the big buck also.