The reason Winchester had Simmons come to their plant to instruct the Winchester people about the (Simmons designed) rib was because of rising material, labor costs and the popularity of the vented rib. Bottom line is- the word Simmons tacked on a Model 12 means aftermarket rib. On a 42 it means it isn't worth what one without it is. They work just fine, but most people who buy them today would prefer they didn't have the stamp. So, getting back to the original question, if Simmons stamps their name on the side of my Fox, I'm going to get nasty about it.