Lithuania: Old airmail labels

Here is a great lot of old airmail labels from Lithuania.

Year: 7.1926, Günter Mair's catalogue no: - LIT-A-2. Perforated 11 1/4. Comes on sheets of 100(4x25).
Black/Yellow, Ref.: "Forma 219 No", 4**** 

Year: 1937, Günter Mair's catalogue no: - LIT-A-5a. Perforated 14. Comes on sheets of 100(10x10).
Grey-blue/White, 4****

Year: 1.8.1938, Günter Mair's catalogue no: - LIT-A-5b. Perforated 14.Comes on sheets of 100(10x10).
Black-grey/Blue, 4****







Year: Before 1939, Günter Mair's catalogue no: - LIT-A-5c. Perforated 11 1/4. Comes on sheets.
Black/Blue, 4****