Gulf Oil (American, founded 1907). Four original SSP "No-Nox Knockproof" gasoline pump plate circular advertising signs.

Provenance: Private Collection, Atlanta, GA.

Approximate dimensions: dia.10.5", stacked together h. 0.75".

Very good color and gloss, two have some material stuck on the outer edge with one showing some spotting, third has an edge chip and light scratching, and the fourth has a small chip in the blue field. Our grade: 8.5 each.