Morocco: Shell Co. airmail labels

Here is a very nice and colourful airmail label from Morocco issued by Shell Company.

Year: 1935, Gummed. Günter Mair's catalogue no: - MRC-C-16, perforated 11 ½, sheets of 10(2x5), issued by Shell Co., black/red/yellow/white, 4****

Year: 1935, Gummed. Günter Mair's catalogue no: - MRC-C-16, perforated 11 ½, sheets of 10(2x5), issued by Shell Co., black/red/yellow/white, 4****