Air Mail cover A selection of flown covers, several first flights, with examples from 1922 with first flights of 1923 Nong Khay-Bangkok (50 carried), 1924 Rio Etch-Bangkok (3), Ubol-Bangkok (4) and Uttara-Bangkok (3), 1925 Nong Khay-Bangkok, 1930 Amsterdam-Bangkok and many others; also a selection of air mail cancellations on pieces and blocks. (120 covers)