Dated March 20, 1952. I have no idea what this piece is worth. Its all original, the glass is perfect as well. If anybody can give any idea of its value I would greatly appreciate it. It was my grandfathers and now it has been handed down to me. It weights about 15-20 lbs, about 4-5'' thick, and about 15''-18'' diameter(maybe more). Thank you! (the picture seen above is with the sign lit up and working properly)