Just a couple of additional items to note:
-- A 1989 magazine article noted: "Dave Rochlen, the 63-year old owner of Surf Line Hawaii, Ltd., was a computer programmer for military intelligence before he moved to Hawaii 30 years ago." and "...these 'jams' received nationwide publicity when featured in Life Magazine and became a sensation. Rochlen's sales totaled $1.5 million during the craze, after which he produced traditional sportswear. Twenty years later the Jams fever revived..."
-- A 1989 journal article about the Surf Line product noted: "...Rochlen, its co-proprietor conceived of baggy, drawstring-waisted, nearly kneelength shorts to which he applied the brand name “Jams.""
-- A 2005 blurb about Rochlen reported: "Dave Rochlen--Entrepreneurial surfer from Santa Monica, California; one of the original post-World War II Malibu regulars; co-founder in 1963 of Surf Line Hawaii, a surfboard retail outfit, and founder of Jams beachwear in 1964...Rochlen and his Hawaiian-born wife created the Jams line (in 1963); the loose-fitting and brightly colored surf trunks were an instant success..."