South Africa: Airmail labels 2

Just started to sort out airmail labels from South Africa. This lot is of the early issues of airmail labels.

Year: 12.1925, Gummed. Günter Mair's catalogue no: - RSA-A-1, rouletted, sheets of 50(5x10), 
intended for experimental airmail service, 1925. Remaining stocks used during 1929. 
black/grey-orange, 5*****

First flight post card: Captown-Durban 26FEB1925

Year: 9.1929, Gummed. Günter Mair's catalogue no: - RSA-A-2, rouletted, sheets of 50(5x10),
black/greenish blue, 4****

Year: 3.1932, Gummed. Günter Mair's catalogue no: - RSA-A-3, rouletted, sheets of 50(5x10), 
space between "PER" and "LUGPOS": 1.5mm, black/violet-grey-blue or grey-blue(unlisted color variate), 3***

violet-grey-blue

grey-blue

Year: 3.1933, Gummed. Günter Mair's catalogue no: - RSA-A-4a, rouletted, sheets of 50(5x10), 
space between "PER" and "LUGPOS": 0.5mm, black/violet-grey-blue, 3***

Year: 3.1934, Gummed. Günter Mair's catalogue no: - RSA-A-4b, rouletted, sheets of 60(5x12), 
space between "PER" and "LUGPOS": 0.5mm, black/greenish blue, 3***