Bulgaria: Airmail labels

Here are an old labels from Bulgaria.

Year: 1929, Gummed. Günter Mair's catalogue no: - BUL-A-2, perforated 11 ½ , sheets of 100(10x10)
frame size: 29x29mm, black/light grey-blue, 4****

Year: 1933, Gummed. Günter Mair's catalogue no: - BUL-A -3b, perforated 11 ½ , sheets with pairs of
tête-bêche, red/white, 5*****