St Vincent - Bequia $1.50 Plymouth Superbird (1970) set of 5 imperf progressive colour proofs in se-tenant pairs comprising the 4 basic colours plus blue & magenta composite (5 pairs) unmounted mint
St Vincent - Bequia $1.50 Plymouth Superbird (1970) set of 5 imperf progressive colour proofs in se-tenant pairs comprising the 4 basic colours plus blue & magenta composite (5 pairs) unmounted mint