Scarce, early highway map of Southern California issued by the Shell Oil Company in 1929.
The map comes from an interesting transitional period between the old named Auto Trails and the full adoptions of the 1926 numbered highway system. Many of the main routes still bear their earlier names as well as the new numbers (e.g., "Old Spanish Trail Route 80", "Golden State Highway Route 99", "Nat. Old Trail Route 66", etc.)
On the verso are a detailed map of the Los Angeles metro area and a map of the United States showing the service coverage of Shell.