Hand painted sign, had wood frame on back but was badly rotted. This sign was given to me by a guy who I get my lance jars from, every time I stop it seems like he has one. I tore the wood of of back and it says Allis Chalmers 92x18, From Stout Sign St. Louis Mo, P.O. WAS5321 17A, 3600. Anybody know how old this is?