Тувинская Народная Республика
The Tuvan People's Republic issued postage stamps between 1926 and 1936. They were popular with stamp collectors in the Western world in the mid-twentieth century because of the obscurity and exoticism of Tannu Tuva and the stamps' quirky, colorful designs. The validity of many stamps purportedly issued by Tannu Tuva has been questioned by philatelists.