1912 - 1990 (approximate. ), mostly unused and mint never hinged collection "Airmail and Zeppelin stamp" with many complete and better issues before 1945, as well and on Germany with semi-official airmail stamps and dependencies, much Italy with and on 13 values from Michel-no. 445-446 with mostly different letters combinations, much Russia with useful, Switzerland including airmail stamps 1913 and Czechoslovakia with useful perforations from Michel-no. 192-194 (often signed Mikulksi), in addition to it and on by France still many old vignettes, high catalog value!