A very rare variant of the Olkusz trojak.
A type with a royal bust in an ornate robe, with a titular design beginning with SIG 3, but with an error in the reverse legend - the engraver's erroneous digit 3 of the date (in mirror image).
Of the entire vintage, rich in varieties, this error was noted in Iger in only one variant. This one was not described (obverse with star after POLONI, reverse without punctuation errors).
It is also noticeably rarer than the degree of rarity in the Trojak catalog would indicate. In our offer this variant, the first and last time, we had it in 2016 (but with a different obverse).