Argentina: Airmail labels

These are non postal issue labels from Argentina.

Year: approx.1945, Gummed. Günter Mair's catalogue no: - ARG-C-4, rouletted, sheets,
dark violet-blue/light greenish blue/white, 4****

Year: approx.1970, Gummed. Günter Mair's catalogue no: - ARG-C-14, rouletted (brown lines),
sheets, brown/white, 3***

Year: 1967, self-adhesive. Günter Mair's catalogue no: - ARG-C-16, imperforated, blue/white, 2**