Winchester subcontracted with Simmons Gun Works, Olathe Kansas and Moneymaker in Omaha Nebraska for some rib installations. The presence of proof marks on the receiver and barrel extension indicate that if this was not done by the Winchester plant it was done by an authorized Winchester sub contractor. I have never seen a post and donut rib on a Simmons gun so I'm pretty sure it was either done by Moneymaker or Winchester. The absence of the duck bill on the receiver suggests it is a Moneymaker rib however Simmons used this type of transition to the receiver also.
