Williwaw was built and launched in Algonac, MI in 1958. Her hull number is 42-217. She was originally delivered to the Cooper Boat Works in St. Clair, WI. She is classified as a Constellation, Flush Deck Motor Yacht and has always been a documented vessel. 

She is believed to have been christened the "Miss Exide" and owned by the Exide Battery Company of Detroit. In the early 1960's she was shipped to Seattle and purchased by Tom Kipper of Kipper & Sons Engineering. She was renamed the Williwaw at that time and flew the Meydenbauer Bay Yacht Club burgee. 

During the mid 1980's she was purchased by Mark Warner. The boat name was retained. 

She was purchased by Bill and Priscilla High in 1987 and flew the Tyee Yacht Club and Queen City Yacht Club burgees. 

Under the High’s ownership she was repowered in 1991, bright work was redone in 2005, teak decks were redone in 2006, and her bow was rebuilt in 2010. Her hull was last painted in 2012. There have been no major changes or renovations to her original design.

In 2022 she was purchased by Ryan Moss of Seattle, WA. She maintains her status as a documented vessel and flies the Tyee Yacht Club burgee.