Hipshot 4 string bass bridge, model 5K400B. Retail price is $112. It came on a loaded jAzz bass body that I recently picked up, but I switched it out for a chrome version of the same bridge that I already had sitting in my parts bin. Brass adjustable saddles, 5 bolt mount, top-load only unless you want to drill holes into it.
Asking $50 cash, or may consider trades for other guitar/bass stuff. Nice Jazz bass pickups maybe? EQ or line selector or other pedals? Could use a 1x12 bass cabinet too.
I'm also selling a set of Fender Tex-Mex stratocaster pickups and a Hipshot bass bridge if you're interested. Could potentially do a package deal or trade for all 3.
I'm located in Kingston and can meet up within a reasonable distance depending on schedule and the deal. Possibly at or near the Kingston ferry terminal if you want to walk on from Edmonds or Seattle.