Lot 712
712
unused Block of Four 6c-24c 1918 Air Post (C1-C3), blocks of four, all stamps never hinged except for two 16c, one 6c natural inclusion, 24c weak perfs., otherwise fine set, Scott retail $1,120.00 est.

Details
unused Block of Four 6c-24c 1918 Air Post (C1-C3), blocks of four, all stamps never hinged except for two 16c, one 6c natural inclusion, 24c weak perfs., otherwise fine set, Scott retail $1,120.00 est.