This coin is a special edition from the series known as So-Called Dollars, cataloged by Hibler & Kappen. It was produced in 1957 and has a diameter of 70 mm, indicating it is larger than many standard coins. The piece is made from bronze and has a mintage of only 21,705 units, which lends it a certain rarity and potential collectible value. The coin does not bear a traditional mint mark, which is typical for many special issues, and it lacks specific information regarding its weight, edge type, or designer. The absence of these details does not detract from its significance as a collectible coin, particularly among enthusiasts of American numismatics and those interested in So-Called Dollars. Given its special production type and relatively low mintage, this 1957 coin holds interest for collectors, and it exemplifies a unique part of American numismatic history. The designation as a "coin" is somewhat broad due to its lack of standard monetary denomination and proper specifications, as it serves more as a commemorative piece than as a circulating currency. Overall, this coin represents a fascinating collectible opportunity among the So-Called Dollars, characterized by its unique size, material, and historical context within American numismatics.