I compared an original and a repro at a show and you could feel more relief on the lettering on the original sign. The repro was very smooth to the touch and you could barely feel the lettering. Neither sign had grommets. Some originals are also marked with a ink stamped date on the back such as SPS60 or SPS62. Just looking at a photo of the front of a sign it is impossible to tell an original from a repro.


Bill Fortune