Air Mail AIRMAILS: Mint and used collection on leaves and stockleaves with early vignettes (4), 1923-40 mint and used including grilled gum, 1924-37 with 75c. used normal and grilled gum, 1929-33 mint and used with both gums, 1930 2f. mint and used, 1941-48 set mint, "PRO AERO" fine used block of four and others with some sheets and multiples