As per Brad's comment on who did the bolt replacement on the Hand.... in fall 1997 I organized a mini-expedition to go and rebolt the Hand. Brooks White, Kelly Rich, Dave Rubine and I spent a day on the front side replacing as many bolts as we could find.
I labelled every bolt and made a photocopy of the topo and sent everything to the Access Fund so they could put a plaque together with the bolts for one of their fundraising auctions. Longtime Pinnacles climber, Sam Davidson, was working at the Access Fund and mentioned that they had done that with some other historical bolts from routes like The Nose of El Capitan and they usually got some nice coin as a result.
Also, I remember a friend telling me that he once discovered two, old fixed pins driven into cracks at the base of the knob you stand at the first belay of the Salathe Route. I mentioned that to Kelly and he removed them as well. I sent the pitons to the Access Fund along with the bolts. There was some question that these pitons might have been Salathe's originals. It took me several years, but I finally tracked the pins down to Neptune Mountaineering in Boulder and was able to verify that they were indeed old, but probably not Salathe's.