Extremely rare first vintage known in a few pieces. Looking at all domestic post-war auction listings, there is only one other listed piece, sold at the 15th GNDM auction for 44,840 PLN. The likelihood of acquiring this vintage for a collection over the next decade may not happen again. The vintage is known only from a new mintage from the late 1850s (mintage for circulation was not available). Coin with very high valuations and degree of rarity. Iger rarity R7, Berezowski valued at 40 zloty. In comparison, 10 zlotys with Alexander 1820, 1821, 1823 are valued at 25 zlotys, while trojaks of the following years, are valued: vintage 1817 - 0.60 zlotys, 1818 - 10-12 zlotys, 1819 -2-4 zlotys, 1820 3-8 zlotys depending on the variety. Only a comparison to other coins of the era, shows how high the valuation is at 40 zlotys. However, rarity alone is only the beginning of the advantages of the offered coin. The coin is beautifully preserved, without circulation wear, with the highest NGC grading grade, the so-called TOP POP. PIECE FOR THE MOST DISTINGUISHED COLLECTIONS.