Best Venue
List with a specialized automobilia/petroliana auction house (e.g., Morphy Auctions, Mecum, or Richmond Auctions) to reach the dedicated collector base. Prior to listing, carefully clean the surface with mild soap and water to maximize gloss, and measure the exact height and width to confirm the specific variant for the catalog.
Upside Potential
If the sign is confirmed to be the larger 78-inch variant and the central field is exceptionally clean (grading 8.5+ out of 10 with high gloss), it could reach or exceed the $1,700+ high end seen at premium auction houses.
Vintage porcelain advertising signs are frequently reproduced due to high collector demand. While the reported edge chipping is consistent with authentic age, modern reproductions often artificially distress edges. Without seeing the back (to check for authentic layered enamel and heavy steel) or a maker's mark, a medium risk is warranted. Authentication of the porcelain layering and grommets is recommended before a high-value sale.