Applehead Siamese is the popular name for the traditional, old-style Siamese, a sturdier, rounder-headed cat than the long, wedge-headed Siamese of the show ring. Some registries recognize the type separately as the Thai, while many cats called appleheads are simply pointed cats of Siamese ancestry, so the label says more about looks than papers.
Expect a pale body with darker points and blue eyes, a short coat that needs only occasional brushing, and a cat that tends to be chatty, clever and attached to its people. Many dislike long stretches alone. Pointed Siamese-type cats turn up in shelters fairly often, and a cat with this much voice and curiosity does best with plenty of play and a perch at the window.