Aden. (Shihr & Mukalla). 1955. Registered envelope addressed to Mukalla bearing Shihr & Mukalla SG 21, 10c on 2a sepia and SG 22, 15c on 2 1/2a blue tied by bilingual Dammun date stamp with bold framed 'R/ Dammun/ No' hand-stamp in violet. Very fine.