Sam Gilliam's "Rays" Sells at Sotheby's for 684.5 million USD

Estimated for 100,000 -  150,000 USD, Sam Gilliam's Rays, sold at Sotheby's Contemporary Curated sale (9/27/17) for 684.5 million USD. 

The acrylic on canvas work which measures 48 x 78 x 2 inches, and was produced in 1971.