The San Francisco Bay Area circa 1931. "Earth-moving equipment and trucks." 8.5 x 6.5 inch glass plate by Christopher Helin. View full size.
  BUY PRINT    The San Francisco Bay Area circa 1931. "Earth-moving equipment and trucks." 8.5 x 6.5 inch glass plate by Christopher Helin. | Click image for Comments. | Home | Browse All Photos