Bidspirit auction | Poland - Pre-World War II

Poland - Pre-World War II Issues - 1919, Cavalryman, 20m gray green, perforation 11½, top right corner sheet margin block of four with perforation freak due to foldover (imperf at right and top right), printed on vertically laid paper, full OG, NH, VF, Est. $100-$150, Sc. # 148, var