PERFECT CIRCLE Piston Rings 1933 Ad – Are you One of The 6,000,00…

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Dimensions: approx. 10.5 X 13.5 inches

PERFECT CIRCLE Piston Rings 1933 Ad – Are you One of The 6,000,000 who will change piston rings? Ad on the back is a full page black and white ad 10.5 X 13.5 in size for Pennsylvania Grade Crude Oil Association. “Better Oils from the Ground Up” Showing a map of the fields across 3 states.