A Southern Pacific Alco S-1 wearing the road's pre-WWII black & silver livery handles local freight traffic in these undated California images, perhaps captured in the late 1940s. The exact location of the activity was not recorded.

Activity inspired in part by content from: "Southern Pacific Railroad", by Brian Solomon

Loco: Elvas Tower ... Consist/Rail Traffic: BLW/ZT + 3DTS ... Route: Pacific Electric