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
