Another one from the parts box. I bought this directly from Fred here in LA for some project that I have since forgotten about and obviously aborted. Never installed. Marked S, but I have no idea which model it is (maybe you do? If so, chime in...) . I did have enough sense when taking the pix to put a ruler against the pole pieces so you can see the overall string spacing, so check with that and figure out if it works for you. I haven't spoken with Fred in a while, but I get the impression these are hard to get your hands on these days. $175 shipped anywhere in the Lower 48.
