Zimbabwe: Airmail Labels

This is an old label from Zimbabwe.

Year: approx.1985, Gummed. Günter Mair's catalogue no: - ZIM-A-1a, rouletted, sheets of 36(3x12),
smooth paper, "PAR AVION" : 14.5mm, bright blue/white, 2**

Year: approx.1987, Gummed. Günter Mair's catalogue no: - ZIM-A-1b, rouletted, sheets of 36(3x12),  
rough paper, "PAR AVION" : 14.5mm, dark blue or dark violet-blue/white, 1*