Its been awhile since I have posted, thanks for looking, this issue has been covered im sure, but all the replies do not answer my questions on this find. It measures slightly over 11-3/4 in, it has a Gray what I call graniteware porcelain back. The rivets show sign of actual mounting, splits. There is not a white border. any Reponses appreciated Todd (Peggy)

oldgas2.jpg oldgas3.jpg oldgas1.jpg

Bryan T Hackney