'Professionally reblued' does not tell us much. Model 12 shotguns from that time frame were not originally blued using the modern hot-salt bath method. If your gun has been polished and blued using the hot salt method the color and degree of polish will be incorrect and value will top out at $250 as a shooter. If the gun has been heavily polished with markings obliterated, straight edges rounded, etc, the value will be even less. If the gun has been prepped correctly and then RUST-blued, it still might bring $350-$400. sales@countrygunsmith.net