Have been all over online trying to find info on this firearm I would like to buy. Just want to know a reasonable price to offer. S&W doesn't seem to offer the SN lookup tool I have seen mentioned. The firearm is a .45 Colt 625-6 Mountain Gun, SN CAT0002. 3.965" barrel (muzzle to cylinder), Hogue round bottom stock. Some more numbers on the frame with grip removed, right side. 21575 and 813, left side C24, 600, a large N, a large C, and an S stamped onto the large C. Just joined tonight. Hopefully I am doing this right. I know I am in the right spot.