Dad has the gun now and I just came back from seeing it. It has a metal pistol grip cap and the checkering is the same as his 1961 Model 12 Trap. I need to look up the ser. no. to determine the age, but it is 1083xx. The rib is marked Simmons, but there is the proof mark just to the left of the rib, right in front of the receiver. I had always heard and it may be wrong, but I had the story told that Win. sometimes or was it just some years, had Simmons sometimes but the ribs on for Win. I do know though, at least in Mod. 12's, there are MANY Mod. 12 trap guns that started out as field guns but had ribs and after market wood added later.