Iceland: Airmail labels

Here are some of the first airmail labels from Iceland.

Year: 5.1928, Gummed. Günter Mair's catalogue no: - ICL-A-1, perforated 11, sheets of 96(8x12),
ref.: "Eyoubl.nr.102.  1000-5- `28",  black/light blue, 4****

Year: 8.1934, Gummed. Günter Mair's catalogue no: - ICL-A-3, perforated 10 ¾  , sheets of 50(5x10),
black/blue or light blue, 4****

Year: 1939, Gummed. Günter Mair's catalogue no: - ICL-A-4a, perforated 10 ¾  , sheets of 50(5x10),
black/blue, 3***

Year: before 1949, Gummed. Günter Mair's catalogue no: - ICL-A-4b, perforated 10 ¾  , sheets of 50(5x10), black/blue or light greenish blue, 3***