Literature: Shlapinskiy, Belopolskiy, Krzhanivskiy - not noted (hybrid of stamps from items 34 and 35)
Kaminskiy, Kurpievskiy - not noted
Not described anywhere variant with error on obverse and reverse.
Obverse IO:CASI-M-D.G ♞ REXPOL-ET-SVE-.
Reverse GROARGEN-SE-XREG-POL-1661
A very high rarity in a very attractive state of preservation with a considerable amount of mint mirror.