This is the second known prototype ever made and is seen in the original 1977 non-fine tuner patent. This can be considered the first double-locking prototype, and although the design is crude, it features all characteristics of the future non-fine tuning designs (FRT-1, FRT-3).
There are no photographs of the actual unit, although it can be assumed Mr. Rose still has possession of it. This patent was filed on January 3rd, 1977. It was granted October 23rd, 1979. By the time the patent was granted, Floyd already redesigned this version into the FRT-1.