Poland
Stephan Bathory Groschen 1580 AU50 NGC, Olkusz mint (NGC incorrectly attributes this example to Lithuania), Kopicki-498 (R7). An extremely rare variety featuring the trefoil below the reverse arms, rather than above. The portrait is weakly struck, but this piece is otherwise very appealing.Ex. Künker (January 2011, Auction 180, Lot 595)
Estimate: 3500-4500 USD