Sri Lanka (Ceylon): Airmail labels 4

Another great lot of airmail labels from Sri Lanka.

Year: approx.1975, Gummed. Günter Mair's catalogue no: - SLK-A-7a, perforated H 11, V strips of 
10, 3.line (Tamil): 29mm, some sheets come with printing blurred, dark violet-blue or dark blue or dark grey-blue or blue or grey-blue or greenish grey-blue or light grey-blue/white, 1*

Year: 1989, Gummed. Günter Mair's catalogue no: - SLK-A-9, rouletted H 11, V strips of 10
3.line (Tamil): 24mm, dark violet-blue or violet-blue or blue/white, 1*

Year: before 7.1952, Gummed. Günter Mair's catalogue no: - SLK-C-1, perforated 11 ¾ , booklets
with sheets of 4(1x4), blue/white, 4****