Masonic Birthday Celebration, Feb 20, 2010 Challenge CoinMeasures Approximately: 1.75 InchesNo Special EdgingFront: EA Grove Lodge #187, FC Bentonville Lodge #56, MM Pittsburg Lodge #187Back: George Washington's Birthday, February 22, 1973Challenge Coins are generally created for the Military and are prized by the service members that receive them. Perfect for Collectors of Militaria.