The stock may or may not be orginal to the gun. But it is an orginal field stock with after market checkering. The clue is a common error that some do when attempting to up grade to a factory deluxe by forgetting to cut a pisol grip that takes a grip cap. Which also means the wood has to be undercut in the rear where it blends into stock. All of this something to aware of as the market for model 12's reaches for the sky . EG How many bent nose pigeons have you seen on (pigeon grade's.) In the old days there were a couple of engravers that would cut them in for $25-35. at the local trapshoots. So use care in selecting your model 12. Look at them as a shooter not the end of the rainbow.