Argentina: B.S.A.A airmail labels 2

Some more airmail labels from B.S.A.A airways.

Year: 1947, Gummed. Günter Mair's catalogue no: - ARG-B-10, perforated 11, sheets,
dark violet-blue/dark blue/light blue/white, 4****

Year: approx.1950, Gummed. Günter Mair's catalogue no: - ARG-B-12, perforated 11, sheets,
dark violet-blue/light blue/white, 4****