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airmail
1919, Apr 30
1919 air issue ovpted granite paper wmk.
Swiss cross p.
11.5
1923, Mar 1
1923 air issue unwmk (10 stamps)
1929, Jul 1
1929 air issue
1932, Feb 2
disarmament air issue
1935 1935 air provisional issue ovpted (7 stamps)
1938, May 22 ovpted (no wmk info) (no perf info)
1941, May 1
1941 air issue unwmk p.
11.5 (8 stamps)
1941, May 12 ovpted (no wmk info) (no perf info)
1943, Jul 13
unwmk p.
11.5
1944, Sep 1
1944 issue
1944, Sep 20
1946, May 1
1947, Mar 17
1948, Oct 1
1949, Apr 11
1963, Jun 1
1986, Sep 9
postal system
1 to 47 of 47