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Lot # 729 | ** | Scott # 412a
| 1929, Pioneers' Assembly, 14k slate blue, bottom sheet margin vertical pair, lower stamp with perforation 12 1/2 x12x10 1/2x12, top stamp has small spot of gum skip, error stamp is completely flawless, full OG, NH, VF and rare, N. Mandrovski certificate . |