25 Ngultrum - Jigme Singye Wangchuk Boxing

Unofficial issue.
Previously known as KM#59, X#1
Mint: Franklin Mint, US

Part of the "International Sports Coin Collection" set. The set consists of 19 Copper-Nickel coins/medals (struck by the Franklin Mint) and a 1983 US Commemorative silver dollar, all in proof:
Bhutan - 25 Ngultrum - Boxing (this coin)
Bhutan - 25 Ngultrum - Shot Put
Congo - 100 Francs - Handball
Guinea - 200 Sylt - Race Walking
Guinea-Bissau - 250 Pesos - Balance Beam
Guinea-Bissau - 250 Pesos - Horizontal Bar
Lesotho - 10 Maloti - Field Hockey
Lesotho - 10 Maloti - Hurdling
Liberia - 10 Dollars - Weightlifting
Liberia - 10 Dollars - Basketball
Maldives - 25 Rufiyaa - Swimming
Maldives - 25 Rufiyaa - Soccer
Mauritania - 500 Ouguiya - Running
Mauritania - 500 Ouguiya - Fencing
Mongolia - 10 Terper - Equestrian
Mongolia - 10 Terper - Archery
Sao Tome & Principe - 20 Dollars - Horse Vault
Tonga - 5 Pa'anga - Judo
Tonga - 5 Pa'anga - Relay
United States - 1 Dollar - Discus (KM#209)

According to the accompanying Certificates of Authenticity, the release was officially authorized by the Amateur Athletic Union (AAU), had a mintage of 100,000 and that the coins are not legal tender in the issuing countries - with the exception of the US dollar. Once that became known, they were removed from the Standard Catalog of World Coins and moved to Unusual World Coins.

The set was distributed by the Calhoun's Collectors Society - a mail-order company that existed in the 1970s-80s in Minneapolis/Edina, MN (USA) that sold coins, stamps, and various other collectibles, including stamps, coins, etc. The company went out of business due to numerous legal problems in 1984 - the year the set was released.