16 x 17 Blue Printed lithographic map from the evidence archive of the 1917 SVWCo. VS SFPUC lawsuit with tags and tanning from long term storage. A rare , in fact unique document from the most important water lawsuit of the 20th century in California. Excellent early content used to outline the ownership of lands within Contra Costa County and the Ranchos along El Sorbrante. Fine original condition . a museum piece available.