Here are some nice airmail labels from Ceylon.
The Dominion of Ceylon, known today as Sri Lanka, was a dominion, in the British Empire between 1948 and 1972. In 1948, British Ceylon was granted independence as the Dominion of Ceylon. In 1972, the Dominion of Ceylon became a republic within the Commonwealth, and its name was changed to Sri Lanka. The Dominion of Ceylon was an island country in South Asia, located about 31 kilometres (19.3 mi) off the southern coast of India.
Year: approx.1970, Gummed.
Günter Mair's catalogue no: - SLK-A-6a, perforated H 11,
vertical strips of 10, Bright blue/white, 2**
Year: approx.1965, Gummed.
Günter Mair's catalogue no: - SLK-A-6a, perforated H 11,
vertical strips of 10, Dark blue/white, 2**
Year: approx.1965, Gummed.
Günter Mair's catalogue no: - SLK-A-6a, perforated H 11,
vertical strips of 10, Blue-grey/White, 2**