Originally Posted by PieroF
I think Tin, but I'm not sure... the sign is really heavy... how can I determinate if is tin or porcelain?

Look at your closeup photo with the "REG. T. M. " lettering. The drilled hole with no paint in the hole, and no chipping around the hole, is an indication of a painted, not porcelain, sign.

Jim "Oldgas" Potts
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