This medal was minted by the authority of the International Fraternal Commemorative Society, founded in 1966 by a group of Midwestern Masons. It was struck by the prestigious Franklin Mint in 1967 in a minuscule mintage of just 1,293 pieces. Many of these pieces, like many other coins and medals minted in this era, experienced severe withdrawal from the collector market into the melting pots during the "great silver melts" of the late 1970s and 1980s (caused primarily by the run-up of silver prices by the Hunt brothers). It is 39 mm in diameter and made of solid sterling silver -- larger than an old US silver dollar! It is a Proof , Plus no one know's how many are left with all this melting, I was told It is probably less than 500 to 600 left. The medal's low mintage, the effects of the silver melts and the popularity of the subject matter makes this one extremely collectable and an interesting addition to any Freemasonry collection. Coin weighs 27.6 grams on solid sterling silver proof. See pics they show and say it all!