Bidspirit auction | United States - Modern Errors

United States - Modern Errors and Varieties - 1991, Cole Porter, Composer, 29c multicolored, bottom left corner block of six (2x3), ZIP imprint at the foot edge, imperforate horizontally, full OG, NH, VF, C.v. $800 for vertical pair imperf horizontally, Est. $600-$700, Scott #2550a