People had been telling Duke Fox that his engines had ugly finishes. So Duke decided to make the .35 stunt's pretty.
General Electric had a plant in Fort Smith at that time, and were making a run of dishwashers. The dishwashers had some aluminum trim on them that GE was anodizing a gold color.
Duke cut a deal with GE and had a run of Fox crankcases, backplates, and heads anodized Gold, assembled the engines and put them out to sell. Bob Gieske's favorite engine back in those days was a Fox .35 stunt engine. His favorite engine was the Gold Fox.
The gold color was funny; on some engines it would come off quickly, and on others the gold would last.
Duke tried to make another run of gold foxes the next year, but GE was no longer anodizing aluminum pieces a gold color, so Duke was out of luck.
The Fox factory and all the machine tools and miscellaneous equipment was sold several years ago.