1969 unfranked O.H.M.S. cover sent air mail to England with a red CERTIFIED OFFICIAL h/s on the front and a FIELD POST OFFICE 514 / 20 FE 69 datestamp. On the back a label is affixed with CENTRAL REGISTRY / 20 FE 1969 / R. A. F. SHARJAH in red. The envelope has instructions to “‘Open by cutting the label. Reuse with fresh label.” Fine and very uncommon.