National Flag of the Azeri Soviet Socialist Republic, circa 1980s.
In nylon. Measures 180 cm x 90 cm (about 6' by 3'). No factory label, but definitely made during the Soviet era, when Azerbaijan was still a part of the USSR.
Excellent condition. Shows storage age only, no visible spots or damage of any kind. With careful steaming (not direct ironing), the folds should relax and begin to disappear.