My dad stumbled on a yardsale last weekend of a woman who had a gun collecting dad. He said there were hundred of these books so he picked a few that looked really cool. One was an auction book from Christies from 1981. He opened it up and the guys auction list was in there for just what he was selling. He showed it to the daughter and she wasn't even surprised. Said she still has a lot of his collection and is working to get it appraised.