I found 2 of these signs ,they measure aprox. 12"x 24" and are aprox. 1/2" thick cast in brass. Each piece weighs 20 pounds. I was told the came off a old bank in Webster Ma. that is now long gone. They are completly untouched and have been stored in a barn for many years. They don't seem to be marked by any mfg.
Any information on these pieces would be greatly appreciated and should they be cleaned or kept as is. Thanks , Bill