These appear to be porcelain coated metal. They came off a 1930's era substation wrecked out in Hamilton, OH in 1996. There was a lot of 1933 dated blue JD disks in the substation. The longer sign is around 12" long and the smaller ones are close to 6" square. They are in rough shape with the corners beat up pretty bad. It appears they were ripped from there mountings instead of unscrewed. $28 for the set INCLUDING flat rate prioirty shipping to the lower 48 only. May be able to arrange delivery to Springfield for $20. Now $15 to Springfield First e-mail... Thanks for looking!