1914, 50 Kop. \"Romanow\", variety \"double comb perforation\", decorative block of four from upper right corner, the two of them upper values with double comb perforation, mint never hinged, at the upper margin of sheet outside of the stamp design rest of hinge visible, likewise on the rights lower stamp, expertise Ludger Hovest VP (2021) : \"a very nice and scarce unit this set. \"