YWS - Yellow/Silver Stripe with Red & Yellow Skirt
or
Yellow/Silver Ribs

Solid yellow body with silver ribs or silver stripes on sides, silver stripe down the back, i.e., silver spine. This color first appears in Heddon's 1972 catalog for the Big Chugger Spook and was called Yellow/Silver Stripes with Red & Yellow Skirt. By 1974, the name had changed to Yellow/Silver Ribs and applied to all Heddon lures.

This is a cataloged color for these lures, c. 1970's. (Picture of Big Prowler courtesy of Don Grimm!)