The years 1960 to 1972 saw non-streamlined freight locomotives sporting the "Billboard" color scheme (sometimes referred to as the "Bookends" or "Pinstripe" scheme), wherein the units were predominantly dark blue with yellow ends and trim, with a single yellow accent pinstripe. The words "Santa Fe" were applied in yellow in large bold serif letters (logotype) to the sides of the locomotive below the accent stripe (save for yard switchers which displayed the "SANTA FE" in small yellow letters above the accent stripe, somewhat akin to the "Zebra Stripe" arrangement).