Sanborn Maps, Vol. 3, Page 285-286, San Francisco, David Rumsey Map CollectionCopyright 2010, Cartography Associates. Some Rights Reserved.Creative CommonsThis detail from an 1905 Sanborn map of San Francisco shows that the 530 Buchanan Street used to be 510 Buchanan. 530 Buchanan StreetEra: 1900sPlaces: Buchanan StreetSites: San FranciscoDavid Rumsey Map Collection