ppc gun...........
good information above, and thatis a nice ,late model variation, by the serial number, as well as the fact it as done as a "slab side" which is the way they do it today......back in MY day, the Clarks, Wilsons, Pachmayrs, etc as well as about ANY shop I know or have worked with ,dealt with, built these ,wish I had a nickel for everyone we built, saw, used back in the early ,mid 70's....... usually ours ( and most) were built on a "K" frame, using a Douglas 'airgaged' barrel, various lengths, and for the most part we used a BoMar, Aristocrat, of whom evers' rib on the top...now we see more optics on them , like yours pictures, yes costly to build, the price of the gun, and then starting around $1200 and up, but they were built for competition, ergo,meant shot, and shot a LOT....resale values are about 1/3 to 1/2 the price of the sum of the total of the parts...nice gun, and will shoot better than any of us can ..........
the main thing is that the BIG boys, all "signed" (marked) the barrels, gun in some way ,so without that that there is NO way to really know just "who/whom" built yours......