Here is a nice and colorfull airmail label from Rarotonga, the main isle from Cook Islands. Thanks for Graham for supplying it for me!
Rarotonga is the most populous island of the Cook Islands, with a population of 14,153 (census 2006), out of the country's total population of 19,569.
The Cook Islands' Parliament buildings and international airport are on Rarotonga. Because it is the most populous island, Cook Islanders may often be referred to as Rarotongan, but they may come from one of the other 14 islands in the group, such as Aitutaki or Mangaia. Rarotonga is a very popular tourist destination with many resorts, hotels and motels. The chief town, Avarua, on the north coast, is the capital of the Cook Islands. (wikipedia)
Year: ?, Self-adhesive, Günter Mair's catalogue no: - RTG-A-2?, imperforated, bright red/bright
dark violet-blue/white, 3***