| This polycarbonate signal with the CH logo was never licensed or distributed by Crouse-Hinds.  It's actual brand was Chapel Hill.  The signal is a knock-off of Crouse-Hinds' Type R, with additional stiffening ribs and double door latches to accommodate the more flexible polycarbonate material.  Actually it is a pretty stout poly signal and the reinforcement ribs on the signal doors have a slight art deco look to them.  The lenses are of Lexan with a pattern similar to Econolite's Lexan lenses. 
Crouse-Hinds took exception to their basic design being used this way and soon after Chapel Hill ceased production.
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