Recently picked up this die cut enameled sign that has been painted over in its past. It has light blue and dark blue visible where some of the later house paint has come off.
36" X 12"
I can't think of what the sign originally advertised. Can anyone help?

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Looking for photos, etc from 60s era Shell-A-Rama gas station and Pal's Diner, Rt. 17 Mahwah, NJ
& US or state highway signs, shields, route markers