Re: the aforementioned ebay purchase...one of its interesting items :) I have never before heard of Aitutaki stamps, I am happy to have one example in my collection, even if purchased.
Aitutaki is one of the Cook Islands, north of Rarotonga. It has a population of approximately 2000, and is the second most visited of the Cook Islands. In 1972, Aitutaki established a separate postal service, and has issued its own stamps (mostly printed by Heraclio Fournier in Spain) since then. These issues are primarily intended for sale to collectors.