Primarily Petroliana Shop Talk Forums Shop Talk Petroliana Forums Petroliana Value Questions GMC Trucks Sales & Service 42" sign

Old Gas,

I'm hoping you can help me judge the authenticity and value of the pictured sign. It's 42" with no maker's mark. The porcelain finish seems a little thin to me and the spots of porcelain loss show more gray/silver than I'm used to seeing on authentic iron signs, where the spots are dark brown.

Any help you can provide is much appreciated.