Front: 理学 $111 SENT Back: 交通繁忙的彩虹道及民航大厦 Tsoihung Road and Civil Aviation Building with busy traffic. 交通錯綜する彩虹道及び民航ビル POST CARD STAMP From Hong Kong PRINTED BY WING TAI CHEUNG PRINTING CO., LTD. H.K.P.O. BOX 16514. 40