I think it's some kind of catalog number or something. What number is it? My two 7 1/2" Model P's that I shot today both have "1520" there. My other Ubertis are 90 miles away so can't look at them now.
Regarding the hard to find parts that Johnson Barr mentioned. I'm not positive on details, but when the Stampede first came out it had strange parts in it. Like the hammer cam and bolt in particular, I think. Gunsmith friend of mine hated working on it. But later I think they changed to more standard parts. Like I said, fuzzy on detail but pulling the grip frame for a look will tell you if you're curious. Enjoy it!
Abilene, my number is 13743. The build date on this revolver is BU which puts it at 2004. I have a stainless Cimarron Evil Roy I purchased about 4 months ago and the number on it is 13728 which puts it only 15 numbers apart. The Evil Roy was built in 2022 but has a number that is 15 numbers lower than the Beretta Stampede and is 15 years newer. I would have thought the number on the Evil Roy would have been higher and not lower since it was made 15 years later. And their closeness is surprising as well.
I have had the back strap and trigger guard off when I installed the faux ram horn grips. The bolt looked pretty normal. I noticed the transfer bar was attached to the hammer in a method similar to how the hand is attached, but much lower on the hammer. As the hammer is drawn back the transfer bar rises. The transfer bar if I remember correctly obscured my view of the bolt hammer cam. It did already have a wire trigger/bolt spring and not a flat one. It also has the newer hand spring that comes through the small hole in the frame. I really like this revolver over the Ruger Vaquero because it is timed so the bolt drops in the proper place on the cylinder and doesn't leave a drag line.
I still haven't had the opportunity to get to the range so I don't know how it shoots, but if it shoots as well as it looks and feels, I think I am really going to like this revolver and I didn't think I would ever say that about a revolver with a transfer bar. We shall see.
I did once have an original Vaquero that shot extremely well but had a brain fart and traded it because of the transfer bar.