I've been looking for this game. I'd appreciate any opinions about this listing I found on Mr. Pinball:
Knockout, 1950 Gottlieb: $7000 firm
This game is a real beauty. On rec.games.pinball noted pinball historian and author Gordon Hasse remarked, "it's got to be the premier example world-wide" after seeing pictures of it. This game was a labor of love for me. I bought the game in a long distance deal in 2003 and sat on it for a while because it needed a lot of cosmetic restoration. Actually it needed a new backglass, playfield restoration and the cabinet was in horrible shape. I bought a repro backglass from Shay Assad shortly after getting the game and then as luck would have it Wade Krause reproduced the playfield for this game and I bought one of those which I received in 2007. In the summer of 2010 I put in a solid six weeks full time restoring the game. For the cabinet repaint I went to an auto body paint supply store and took the cabinet in with me to match up as closely as possible to the original colors. There were unfaded original cabinet colors where the legs were as well as behind the shooter on the front of the cabinet. I made stencils based on patterns from the original cabinet and the entire cabinet restoration has been spray painted. I had to swap out the old playfield for the new repro playfield. The machine has been shopped and works great. This game looks brand new on the outside with the fresh cabinet, reproduction backglass and playfield. All bumper caps are original and I am also including two reproduction caps for both "100,000 when lit" caps that were purchased from Steve Young/The Pinball Resource. A schematic is also included. This game has had at most 20 plays on it since I did the restoration and there is no wear on it at all.