UK: Imperial Airways airmail labels 3

Here are some airmail labels from Imperial Airways issued for customers in Egypt.

Year: 1931, Gummed. Günter Mair's catalogue no: - GBR-B-4, perforated H 11, booklets with 3 or 4 V
strips of 4, "BY AIR MAIL": 29mm, "PAR AVION": 22.5mm, issued for customers in Egypt, 
grey-blue or light grey-blue/white, 4****

Year: 1934, Gummed. Günter Mair's catalogue no: - GBR-B-5a, rouleted H www (looking like perf. 13¼ )
booklets with 3 V strips of 4, issued for customers in Egypt, dark blue/white, 3***

Year: 1935, Günter Mair's catalogue no: - GBR-B-5c, rouleted H, booklets with 3 V strips of 4, issued for customers in Egypt, dark blue or dark grey-blue or grey-blue/white, 3***