20c bright blue ARMS issue 'Etudes & Chassepot, Paris' printing a fine IMPERF PLATE PROOF on ungummed paper in UNISSUED COLOUR. (As SG 74)
20c bright blue ARMS issue 'Etudes & Chassepot, Paris' printing a fine IMPERF PLATE PROOF on ungummed paper in UNISSUED COLOUR. (As SG 74)