Great LARGE Martin MARCO Motor Oil advertising sign. Sign is single sided tin and measures and impressive 42″ x 26″. Appears to have been in a frame. I have not tried to clean this up. The sign dates to the late 1950s / early 1960s. Martin Oil was a historic Chicago Based gas station chain operating from the 1950s through the 1980s. I live in the Chicagoland area and have collected for over 30 years and have never come across this sign before. Awesome piece and takes up a nice amount of wall space. Has some scratches, blemishes, and holes from hanging. See pictures for details. I have been a collector for 30+ years specializing mostly in advertising. Please feel free to reach out with questions.