A very rare vintage, with a mintage of only 44,004 pieces (while, for example, the 1793 vintage was minted with 3,389,003 pieces). So far we have had only one piece on offer, at the 14th WDA-MiM auction, where a nicer piece reached the price of 4658 PLN
https://onebid.pl/pl/auction/604/lot/282/rr-stanislaw-a-poniatowski-zlotowka-1779-eb-rzadki-rocznik-naklad-44-004-szt . Coin with quite nice reverse, obverse weaker. The vintage is sought after in any state of preservation.