Maybe this will help- I know Model 12's and Model 70's (the good ones that is) but am NOT an autoloader man- but went to pages 138-139 of my Stadt book on Winchester shotguns and shotshells- in 1980 he described the M59 Pigeon Grade as follows: "The pigeon gun was introduced in 1962 at $250.00 retail. Like the other Pigeon Grade guns it had custom wood made to customer's specs., hand-honed internal parts and engine turned bolts and carriers.--- Evidently, engraving and carving (wood checkering?) were not available on M-59's. The 1964 catalog did not list the pigeon grade M-59. Hope this helps a bit- RWTF