I would find it hard to believe that the angora chaps you mentioned, belonged to Billy The Kid. I've collected vintage cowboy gear most of my life and have over 1000 premium pieces in my collection. I have never seen a pair of angora chaps from the early to mid 1880 period. I have original saddle shop catalogs and catalog photo cards from all over the west and southwest, dating back to 1879 and NONE of them show or list angora chaps, prior to 1890, give or take a year. Chaps of the 1875 to 1890 period were leather shotguns, made with or without fringe and conchas. Earlier chaps had a straight cut waist belt, while later variations had a curved drop down cut to the laced center of the belt. As pointed out by the mislabeled firearm, museums are notorious for not knowing or understanding what they have. I was once at the Buffalo Bill Historic Center in Cody, looking at a display which included what was said to be one of Buffalo Bills saddles. It was displayed against a wall with a rope barrier in front of it. The sign stated that this early Sam Stagg rigged half seat saddle had been made for Cody by F. A. Meanea in Cheyenne. Although the saddle was close enough to touch, I could not see a makers cartouche. It was a Cheyenne saddle, but I knew it wasn't made by Meanea. Behind the cantle was laced a pair of small saddle pockets. I knew the makers cartouche was hidden under the saddle pockets, so I lifted up the one closest to me and there is was... J. S. Collins, Maker, Cheyenne, W. T.