1.75" issued for baseball's 100th anniversary. Top edge has small celluloid extension with slot for a leather strap. Reverse of the piece shows baseball diamond and there are five notched wheels on the edges for counting innings, strikes, balls, runs home, runs visitors. Front left side has very faint 1/8" pale gray mark barely noticeable. This is a rare premium from Quaker cereals. Seldom offered. Also see rare Jack Armstrong baseball centennial ring item #778.