I have a 1951 Remington Wingmaster w/ventilated rib in 16ga. This gun came with a ventilated rib in 1951, which was ordered by the purchaser. 1950 was the first year they made the Wingmaster. The gun has a corncob style forearm. the gun is in great shape for being 74 years old. 16ga. makes it rare, especially with a ventilated rib. Thanks for looking!!!!!!!!!