Not to date myself, but I remember seeing "like type" boats at Mohave when I was a young kid in 1960. My first ride was in a 15' Glaspar. In 63' my stepfather built a 15' 1/4" plywood flatbottom. Had a Merc 100. Wish I had that boat today. Funny thing is, I still have the all brass 2 blade props.