Here are few more labels from Dutch airlines.
Year: 1936, Gummed. Günter Mair's catalogue no: - NEL-B-13, rouletted H, booklets with 10 strips
of 4, issued for customers in Great Britain, ultramarine/white, 4****
Year: before 1961, Gummed. Günter Mair's catalogue no: - NEL-B-25, rouletted V, H rolls, lettering
modified, blue/red/white, 3***