unmounted mint Block of Four 50c Chicago Zeppelin (C18), B. plate no. 21171 block of four, never hinged, usual natural gum bends, narrow natural gum skip at B., tiny gum soak on one stamp, otherwise fine-very fine, Scott n.h. retail $400.00est.

Details

unmounted mint Block of Four 50c Chicago Zeppelin (C18), B. plate no. 21171 block of four, never hinged, usual natural gum bends, narrow natural gum skip at B., tiny gum soak on one stamp, otherwise fine-very fine, Scott n.h. retail $400.00est.