Franz Veryken was an old family friend. My dads family came from Holland in the early 50’s and after they had their own home, sponsored other countrymen to move here. Franz was one of them and became like a brother. Lived in San Jose somewhere and spent a lot of time wt the Dutch Coffee Shop in Saratoga (Little Amsterdam?). He would come around all the time with his bike inventions. He had various designs where the peddles when up and down instead around. This was probably one of those modified bikes with the mechanism removed. Last time I saw him or his bikes was the early 90’s.