Yemen - Republic 1969 International Labour Organisation 6b The Polishers (German Engraving) set of 4 imperf progressive proofs comprising single, 2, 4 and all 5-colour combinations unmounted mint
Yemen - Republic 1969 International Labour Organisation 6b The Polishers (German Engraving) set of 4 imperf progressive proofs comprising single, 2, 4 and all 5-colour combinations unmounted mint