Keep fishing Stan I have worked on a few of the early accessories and they are pretty much basic and through hole tech. This FS was in the 97 catalog. So it is vintage PS-1 era. I have repaired quite a few of the motor transistors, and motor drive boxes over the years. I did forget about the revised board even though I had one in stock. Never worked on a new FS, and looking at the board I can see why. Much better construction and all SMD.
No date on board, but I would imagine a 95 to 97 vintage.