Mint Quality Large Roman Glass Plate with Exceptional Golden Patina

This exceptional Roman glass plate dates circa 3rd-4th century B.C., and is approximately 9.5 inches in diameter, by 1.85 inches high.  "This mint quality piece has a double base ring, and an exceptional patina with a brilliant golden hue.  A beautiful piece that is seldom seen on the market."  For the type see: "Roman and Pre-Roman Glass in the Royal Ontario Museum", by John W. Hayes, Toronto, 1975, p. 120, no. 468.  Ex; Private CA. collection, Los Angeles, CA., circa 1970's.  Ex: Joel Malter collection, Los Angeles, CA., circa 1980's-1990's.  Ex: Private Ca. collection, circa 1990's-2000's.  (Note: Additional documentation is available to the purchaser.)    $3,275.00