1.75" with front advertising from "Hotel Wallace/Chambersburg, Pa." with upper rim text "Up-To-Date Bar/Billiards And Pool." On the reverse is colorful depiction of baseball diamond which has five tiny cut-outs each with numbers that can be changed by means of five small notched wheels on the edge. Used to keep count of runs and hits for the "Home" team as well as "Visitors" plus a counter for "Innings." This is a gorgeous example essentially Mint. 1930s.