54: Winchester Model 12 Black Diamond in 12 Gauge with 32" Barrel - Man. 1928. This awesome slide action shotgun features a 32" solid ribbed, full choked barrel, a gorgeous select checkered wood English stock with a black diamond insert, select checkered wood forearm, a 2 3/4" chamber, a deep blued finish, a jeweled bolt and magazine guide and a skeletonized metal butt pad with leather insert. These guns are extremely collectable and although this one was refinished at some point in its life, it remains in very good condition with just a tiny hairline crack by the black diamond on the left side of stock. What a show piece. Estimated Value: Low: $2,500 High $3,000