This Winchester manufactured mainspring pin is for the model 1897 slide action shotgun and is in very good condition with light wear. (file photo)
Measure: .125" x .665" +/-
Note: Winchester model 1897 slide action shotguns with the following serial numbers have been observed with this part:
12 Gauge: 74589, 107227, 458896, 645103, 715713, 769466, 912668 & 914469
16 Gauge: 668800, 894353 & 962028