Lot 640
640
unmounted mint Block of Four 6c-24c 1918 Air Post (C1-C3), center line blocks of four, never hinged, fine-very fine set, Scott retail $1,680.00

Details
unmounted mint Block of Four 6c-24c 1918 Air Post (C1-C3), center line blocks of four, never hinged, fine-very fine set, Scott retail $1,680.00