Left: Weidner 135, credit front bottom (damaged), AutoChrom logo, undivided back; postmarked SF 9/07/1904. Center: Weidner 135, credit front bottom, AutoChrom logo, undivided back. Right: Weidner 135, "Cal." expanded to "California", no AutoChrom logo, undivided back; glitter (primarily around edge of water); postmarked SF 11/13/1906. Weidner Catalog shows four variants:
Steve's SF postcard pages: