France: CIDNA booklet of airmail labels

Here is a very nice and complete booklets of airmail labels from CIDNA airlines.

Year: 1932, Gummed. Günter Mair's catalogue no: - FRA-B-31c, perforated H 11, V 11 ¼ , booklets with 1 sheet of 28(4x7), black/light blue-grey, 3***