Possible early yin-yang symbol

Take from http://www.thetao.info/tao/taospotting.htm

“One viewer, David Dawson, went hiking through China and climbed a Taoist mountain, Mt Qiyun, and visited the temple and shrines. This picture I attached, from what a Chinese Taoist priest told him, is the original yin-yang symbol before it became what it is today.”