Nepal: Airmail labels

Here are my first airmail labels from Nepal!

Year: before 4.1974, Gummed. Günter Mair's catalogue no: - NPL-A-1, perforated 10 ¾ ,sheets,
dark greenis blue or dark violet-blue/white, 4****

Year: approx.1980, Gummed. Günter Mair's catalogue no: - NPL-A-2, perforated 10 (irregular),
sheets of 27(3x9), dark blue or blue/white, 3***