This 1935-spec 16″ cast aluminum NJ State Highway 27 shield came to me in really nice condition, with no need for restoration. It’s amazing to think that these little shields were ever the standard on NJ state highways. Route 27 used to extend from Newark to Trenton, but its southern terminus is now in Princeton.
The back of the shield was originally painted white, and was painted over in black sometime after being installed on the road. The white backs may have been considered enough of a distraction to warrant the black-repaint. The photo below from Cranford in the 1930s shows several interesting signs, including cast aluminum NJ-28 and US-22 highway shields with their original white backs near the center of the photo (a front-facing pair is on the far right). US Route 22 was re-routed north of Cranford in 1941.