The Sinclair Oil “Sound Signal for Passing” sign is a rare, old, highly valuable sign once used in traffic and road crossings. It is a long rectangle sign with all the text on one solid line. The text reads: “Sound Signal for Passing – Sinclair” in all white, capital letters. The sign has a forest green background, and the white letters also have dark drop shadows.

May 17, 2013 Antique Advertising Signs, Antique Transportation Advertisements