Bidspirit auction | Soviet Union - Stamps and

Soviet Union - Stamps and Postal History - 1929, Pioneer's Assembly, 14k gray blue, comb perforation 12½x12, vertical position of watermark Borders and Rosettes, raster square, block of 35 (7x5), numerous printing flaws presented, folded between 4th and 5th vertical rows, full OG, NH, VF, C.v. $490++, Est. $200-$250, Scott #412