Registered cover franked with 1953 3 x 10c vermilion and 35c deep blue QE2 issue (SG 51 & 57) tied by multiple strikes of CRATER ADEN cds with printed blue & white 'CRATER' registration label alongside. Addressed internally to R.A.F. KHORMAKSAR with large boxed 'S & C REGISTRY KHORMAKSAR' arrival marking in magenta on front & reverse. Very attractive.