Watch List notes:

CZECHOSLOVAKIA: AV medallic ducat, 1973, Medallic issue struck at the Stuttgart State Mint for the Millenium of the Prague Bishopric, struck to the same standard Czech ducat fineness and weight, mintage of only 100 pieces, NGC graded MS67, RR. A similar example sold in the Aurea Numismatika Auction 64 Lot 269 for 140,000 Czech koruna (about $6800). Another specimen recently sold in the Macho & Chlapovic Auction 13 Lot 318 for 6500 euro (about $6900). This is the only piece so far graded by NGC.

Estimate: 4,000-6,000 USD