This photo hasn't been published since 1947. I've been told that Bob Chaves is still alive & well in the Reno area. Nonetheless, I'm the responsible party when it comes to this picture. Please feel free to publish it when you see fit. Just give me a credit for "District 36: Racers and Remembrances." I must tell you that Bob Chaves was a fine racer & evolved into a first-class tool & die maker. He was always very funny & pleasant. In the picture I've sent you, you'll see Bob "bending up" one of Tom Sifton's hillclimbers.
(Bob is hard at work on a pictorial history of California motorcycling.)