Mexico: C.M.A. airmail labels

Here are an airline issue labels from C.M.A. (Compania Mexicana de Aviacion).

Year: 1931, Gummed. Günter Mair's catalogue no: - MEX-B-3, imperforated, airplane shape, 

grey-green/bright red/white, 5*****

Year: approx.1940, Gummed. Günter Mair's catalogue no: - MEX-B-4, rouletted, VL, booklets,

light grey-green/red/white, 4****

 

Year: 1945, Gummed. Günter Mair's catalogue no: - MEX-B-6, rouletted VL, booklets with 10 sheets

of 5(1x5), dark violet-blue/bright green/bright orange-red/white, 4****

Year: 1947, Gummed. Günter Mair's catalogue no: - MEX-B-7b, rouletted VL, booklets with 10 sheets

of 5(1x5) or 5 sheets of 5(1x5), dark violet-blue/grey-green/bright red/white, 4****