Aden. Circa 1952. Registered postal stationery envelope '30 cents on 3 annas' indigo (Aden postal stationery size H), upgraded with SG 37, 10c on 2a sepia and SG 43, 1s on 1r green tied by Aden date stamp with Aden G.P.O. registration label, endorsed 'Forces To Forces' and sent by '3508540 A.C.I. Carey J.F./ Hut 236/ 4 (A.S.D.) Chapel Hill, Royal Air Force, Steamer Point, Aden' addressed to 'Hut 439, No 2 Wing, R.A.F. Records Office, England' with circular 'Customs and Excise (No 27) censor in violet.