Costa Rica: Airmail labels 2

Here is another labels from Costa Rica.

Year: 1931, Gummed. Günter Mair's catalogue no: - CTR-A-1b, rouletted H, vertical strips,
"CORREO AEREO": 32.5mm, dark blue/red/white, 4****

Costa Rica: Old airmail labels

Here is an old airmail label from Costa Rica. Labels design colors similar to country's flag.

Year: 1928, Gummed. Günter Mair's catalogue no: -CTR-A-1a, imperforated,
"CORREO AEREO" : 32.5 mm. 4****