Authentic Vintage Harley-Davidson Motor Oil Sign - Collectible Enamel Advertising #1210573 (License: Personal Use)

This circular porcelain enamel sign advertises “Genuine Harley-Davidson Motor Oil,” specifying “5 Gallons U.S. Measure” and crediting the Harley-Davidson Motor Co., Milwaukee, Wis. The design features the iconic bar-and-shield motif in yellow and black, with white text on a black field and a double yellow border, showing authentic wear including chips and rust at mounting holes. Its craftsmanship reflects mid-20th-century automotive advertising standards and remains highly sought after by motorcycle memorabilia collectors.

Used in vintage motorcycle shops, gas stations, or collector displays; ideal for enthusiasts seeking authentic Americana decor or documenting Harley-Davidson’s early branding history. Matches user intent for historical signage, restoration projects, or investment-grade collectibles.