I have a Winchester Super X model 1 trigger assembly that is the latest stage III model with the smooth faced trigger blade.
It has been competition tuned by Nu-Line guns and has a reduced take-up and a crisp 50 oz let off.
I have carried this trigger for 30 + years as a spare but have never needed it as I have never had problems with my other two.
Price - $300 + shipping.
Use my Ebay feedback of 100% with the name of "searunbt".
Contact me @ [email protected].