Austria 1780-G IB-IV ducat Fr-193
This specimen was lot 3721 in Goldberg sale 69 (Los Angeles, May, 2012), where it sold for $1,207.50. The catalog description  noted, "Austria. Ducat, 1780-G/IB-IV. Joseph II, as co-ruler, 1765-1780. Laureate head right. Reverse: Double eagle. NGC graded MS-63." This type was struck 1768-80 and is fairly common tho less so that subsequent types. Several types exist for 1780.
Recorded mintage: unknown.
Specification: 3.49 g, .986 fine gold, .110 troy oz AGW.
Catalog reference: Fr-193; KM-1859.
- 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.
- Goldberg, Ira, Larry Goldberg, Stephen Harvey and Paul Rynearson, Goldberg sale 69: the Pre-Long Beach Auction, Ancient and World Coins, Los Angeles: Goldberg Coins and Collectibles, 2012.