The most valuable of those coins — a 1976-S Bicentennial Silver Quarter that came in with a very high grade — sold for $19,200 at auction a few years ago, according to the Chronicle ...

This advertisement has not loaded yet, but your article continues below.

Partly cloudy. Slight chance of a shower. The chance of a thunderstorm. Winds north to northwesterly 15 to 20 km/h becoming light in the late evening. Sun protection recommended from 9:30 am to 5:40 ...