Porcelain or painted ? Looks like it says "made in USA" on one corner and a Date (?) on the other . It could be a reproduction cause I've seen these reproduced before from Auto's , Flight Services like Pan-Am and Gasoline , Oil and others . You name it and it's been repo'd at one time or another . It looks way to new and clean to be real but I'd like to see it more in a close up and also the backside to really give my opinion on it to give it a value. IMHO , Woodstock