Brandenburg 1666 ducat Fr-2259

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Sincona sale 54, lot 179
This specimen was lot 179 in Sincona sale 54 (Zurich, May 2019), where it sold for 8,000 CHF (about US$9,520 including buyer's fees). The catalog description[1] noted,
"DEUTSCHLAND | Brandenburg / Prussia, Friedrich Wilhelm, 1640-1688. Dukat 1666, Königsberg. Sehr selten. Vorzügliches Exemplar mit Prägeglanz. Schrötlingsfehler. (Germany, electorate of Brandenburg, Frederick William, 1640-88, ducat of 1666, Konigsberg mint. Very rare, Extremely fine specimen with mint lustre, Flan defect.)"
This type was struck 1664-67, simultaneously with KM A366 and KM 325, which were struck at the Berlin mint.

Recorded mintage: 3,626.

Specification: 3.5 g, .986 fine gold, .110 troy oz AGW, this specimen 3.46 g.

Catalog reference: KM 335, von Schrötter 87 (Berlin). Fr-2259.


  • 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.
  • Cuhaj, George S., and Thomas Michael, Standard Catalog of World Coins, 1601-1700, 6th ed., Iola, WI: Krause Publications, 2014.
  • [1]Richter, Jurg, Sincona Auction 54: Gold Coins and Medals, Zurich: SINCONA AG, 2019.

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