1934.6.8 Shuangcheng to Shanghai, official cover affixed with commemorative stamps and marking, rare thus. Transit Shanhaikwan with due
1934.6.8 Shuangcheng to Shanghai, official cover affixed with commemorative stamps and marking, rare thus. Transit Shanhaikwan with due marking and Chinese postage due stamps affixed.1934.3.2 雙城寄上海公文封，少見的貼用紀念郵票和紀念戳，經山海關鈐欠資戳記並加貼欠資郵票。
