That sweet little 7-11 hydro was built for Jim Williamson in Fremont, Ca by Dick Casparian of Thunderboat Reproductions. It is all fiberglass and if I remember right it's the 1987 the first year for closed cowls. The 1986 7-11 had an open cock pit.
I got it in a sweet heart of a deal and boy did I love it. I played with it for years and than one day I sold it. Never should have done that!