was a United States sailboat manufacturer located in Southern California. The company was founded in the late 1960s by Frank Butler and produced several popular lines in the 1960s and early 1970s. Many boats are still sailing and racing today.
Frank Butler's initial intent was not to produce and sell boats, but rather to have one built for himself. In 1961, he took over the building of his own boat when boat builder ran out of funds and borrowed money from Butler; the builder was not able to repay the debt. Instead he gave Butler the tooling to continue building the boat. Butler later gained full control of the company, renaming it Wesco Marine and later Coronado Yachts. Many early Coronado twenty-fives have the Wesco Marine nameplate on their transom. Wesco Marine still exists and is owned by Butler, and is a supplier to Catalina yachts. Among the first models built by Coronado were the Victory '21 and the Super Satellite. Production for the Coronado '25 began in 1964. It was the first boat with a one piece interior, making the boat stronger, lighter, and less expensive than previous models. Frank Butler sold Coronado in 1968.