Early Alvar Aalto Leather & Birch Tank Chair Early Alvar Aalto for Artek 400 tank chair circa late 1940’s. This example is stuffed with it’s original horse hair has been upholstered in a lovely palm frond green leather and the birch arms are newly finished. Post navigationPrevious post: Mod Lucite & Chrome TelephoneNext post: 8′ Mohair & Leather Bench