Former Soviet Union (USSR) express delivery cover, posted on June 14, 1990 from Latvia Riga to Taipei, the cover was missent to mainland China, finally arrived on July 4, 1990.
The cover was cancelled with blue ink postal missent descriptional cancellation on backside cover.
前蘇聯拉脫維亞加盟共和國航空快遞郵件, 於1990年6月14日自 Latvia Riga 航寄台北誤入匪區退轉回台, 封背加蓋藍色直式誤寄退回說明戳.
1991年6月14日 自 USSR Latvia Riga 寄出,
1991年7月1日 台北 落地戳 (封背上角)
