Originally Posted by eightbore
They are referred to in the collector world as "Winchester Super Grade Swivels". They are made in at least two widths, 1" and 1 1/4". I am a couple short, but I think I will remain that way.

I'm not sure what width these are but can measure for sure. If you need/want a pair, I'd make you a decent deal. PM if you are interested.