Old Harley Double Sided Porcelain Sign. 50 long, Good condition, great looking Harley motorcycle sign. The item "Old Harley Double Sided Porcelain Sign 50" is in sale since Wednesday, January 15, 2020. This item is in the category "Collectibles\Advertising\Merchandise & Memorabilia\Signs\Original\1930-69". The seller is "brasstown02" and is located in Aiken, South Carolina.