The 500 zloty 1794 is one of the three rarest banknotes of the Kosciuszko Insurrection. At the same time, it is the banknote issued in the smallest mintage of all Insurrection banknotes, if not all circulating Polish banknotes at all, as its mintage is only 500.
The trump card of the present piece is that it is printed on paper bearing the inscribed filigree of the paper mill, seen here in the full notation J HONIG & ZOONEN. However, it is a noticeably faded piece, practically devoid of the paper's pink coloring anymore, with restored losses within the margins. As part of its restoration, not only were the losses filled in, but the whole thing was "duplicated" on the reverse side with bookbinders' tissue paper to strengthen the paper. This was necessary because the effect of prolonged exposure to sunlight was not only to fade the colors, but also to crust the paper.
The banknote was found contemporaneously at home, in France, where it, along with another Insurrection 5 zloty 1794 banknote, hung displayed on the wall as a family heirloom.
Long-term exposure to light has left its mark on the banknote, as can be seen in the photos and presentation, nevertheless this does not change the fact that it is a high-class and very rare Polish relic.
The banknote more extensively presented and discussed in the video.