Poland, John Casimir, the Crown, Tymf (Zloty) 1664, Bydgoszcz mint.
Mint error on the reverse, missing letter T - the initial of Andrzej Tymf's surname on the right side of the coat of arms.
Silver, 6.35 g, 26.1 mm. Kop 1787, var.
Grade: XF, minor blemishes to the sheet metal, lustrous, beautifully preserved and rare.