St Thomas & Prince Islands 1980 Airships 0.5Db (De Lôme) set of 5 imperf progressive proofs comprising blue and magenta single colours, blue & magenta and black & yellow composites plus all four colours unmounted mint
St Thomas & Prince Islands 1980 Airships 0.5Db (De Lôme) set of 5 imperf progressive proofs comprising blue and magenta single colours, blue & magenta and black & yellow composites plus all four colours unmounted mint