I took a look under the trigger guard.There is no number there. However, it looks like the wood is aged like it's been there for quite awhile. Also, the trigger guard is very well fit with no gaps of any kind, same as the lock plates are fit. The gun has the old steel buttplate with the "widow's" peak and it fits into the stock very well. The checkering on the wrist has the same type of border as the forearm. As mentioned, my first reaction was somebody replaced the stock. If so, they sure took a lot of time making it fit and cutting the checkering. The checkering is very well done and has the "age appearance" that matches the rest of the gun.