Germany: Old airmail labels

Here are some of old and rare airmail labels.

Year: 1927, Gummed. Günter Mair's catalogue no: - GER-A-9, imperforated, sheets of 96(8x12) with 
12 pairs of tête-bêche, black/light yellow, issued at Potsdam for Brandenburg, 6******

Year: 1929, Gummed. Günter Mair's catalogue no: - GER-A-13a, imperforated, sheets of 24(3x8),
Ref.: "406", issued at Karlsruhe for Baden, black/blue, 5*****  

Year: 15.3.1922, Gummed. Günter Mair's catalogue no: - GER-A-1a, rouletted H, perforated V 11, 
Sheets of 20(4x5), black/light green, 4****

Year: 1925, Gummed. Günter Mair's catalogue no: - GER-A-4,  perforated 11 1/2, sheets of 70(5x14),
Black/Green, issued at Munich for Bavaria, 4****

Year: 1927, Gummed. Günter Mair's catalogue no: - GER-A-11, perforated 10 3/4, sheets of 20(4x5),
black/yellow-orange, 4****

Year: 1931, Gummed. Günter Mair's catalogue no: - GER-A-14, perforated H 14 1/4, V 14 3/4, 
Booklets with 3 strips of 5 and stamps, Blue or violet-blue/White, 5*****

violet-blue

blue