Vintage Chinese Cloisonné balls for health

These Chinese cloisonne health balls are decorated with traditional Chinese butterfly pattern. In excellent condition. The Production of Chinese health balls dates back to the Ming Dynasty (1368-1644). The inside is hollow and each ball has a sounding plate inside. One emits a high tone, the other a low tone. According to the Chinese traditional medical theory of Jingluo, the hand contains a network of channels which circulate vital energy. Acupuncture points are distributed along these channel