Great Britain 1791 guinea
This specimen was lot 21096 in Heritage sale 3010 (Boston, August 2010), where it sold for $2,185. The catalog description noted, "George III gold Guinea 1791, MS63 NGC, superb mint brilliance with minimal contact marks, rare grade for this heavily circulated type." This type, the commonest of several used during George's long reign, is noted for 1787-99. The reform of 1817 terminated all guinea-denominated issues in favor of the sovereign. At that time the guinea, which heretofore had varied in value, was fixed at 21 shillings.
Recorded mintage: unknown.
Specification: 8.35 g, .917 fine gold, .246 troy oz AGW.
Catalog reference: S3729, KM 609.
- Michael, Thomas, Standard Catalog of World Coins, 1701-1800, 7th ed., Iola, WI: Krause Publications, 2016.
- Friedberg, Arthur L. and Ira S. Friedberg, Gold Coins of the World, From Ancient Times to the Present, 7th ed., Clifton, NJ: Coin and Currency Institute, 2003.
- Lobel, Richard, Mark Davidson, Allan Hailstone and Eleni Calligas, Coincraft's Standard Catalogue of English and UK Coins, 1066 to Date, London: Coincraft, 1995.
- Skingley, Philip, ed., Standard Catalogue of British Coins: Coins of England & the United Kingdom, 46th edition, London: Spink & Son, 2011.
- Tucker, Warren, Scott Cordry and John Kraljevich, Heritage Sale 3010: World Coins, Dallas, TX: Heritage Auction Galleries, 2010.