Persian Gulf. (Yeman). 1963. U.N.E.F. Air Letter written from 'Royal Canadian Air Force, Sana, Yeman' addressed to Italy cancelled by framed 'Officer Commanding/ RCAF Detachment, Sana/ United Nations/ Yemen Observer Mission' with 'UN Force Yemen/ CAPC 5049/ UNEF Middle East' and oval 'RCAF Air Weapons Unit/ Orderly Room/ CAPO 5047, Sardina. Italy' in carmine on face dated 'CAPO/ 5047' Dec 9 1963' on reverse.