1936 (14 Feb) Canton-Fort Bayard-Hanoi FFC, addressing to Hong Kong, f.w. Indochina Scenic issues ovpt. KOUANG TCHEOU 30c, tied by Fort
1936 (14 Feb) Canton-Fort Bayard-Hanoi FFC, addressing to Hong Kong, f.w. Indochina Scenic issues ovpt. KOUANG TCHEOU 30c, tied by Fort Bayard type 5 cds., alongside with first flight commemorative seal.1936.2.14 廣州-西營-河內首航封，寄香港，貼安南景物圖加蓋KOUANG TCHEOU 30生丁，銷西營5型日戳，旁鈐首航戳記。
