Vintage Columbia 300 11lb 3oz Bowling Ball "ERMA" w/ Bag Shoe Space Swirl Dot

I'm not sure what color you would call this. It seems to be part silver, part gold, with a hint of green/yellow.

13lb 3oz bowling ball with bag and include a "Sears Best Superplush" hand towel.

Good condition with some surface marks/scratches. "ERMA" etched into ball. S/N OW62667. Up to 11 inch long shoes fit in bottom of bag. Some scrapes/marks on bag, including a small tear. Please see photos for the full description and hole measurements.