St Vincent 1985 Cars #3 (Leaders of the World) 55c Pontiac Firebird (1973) imperf progressive colour proof in se-tenant pair printed in blue & magenta only (as SG 864a) unmounted mint
St Vincent 1985 Cars #3 (Leaders of the World) 55c Pontiac Firebird (1973) imperf progressive colour proof in se-tenant pair printed in blue & magenta only (as SG 864a) unmounted mint