Sinclair Opaline Motor Oil 4' Single Sided Porcelain Sign w/ Early Gallon Oil CanRichmond Auctions4.6(86)$25Jun 18, 2026
Sinclair Extra Duty Motor Oil DSP Porcelain Advertising SignCheck the Oil Promotions, LLC4.8(635)$175(2 bids)Jun 27, 2026
Rare Sinclair Motor Oil Emb. Single Sided Tin Sign w/ LogoRichmond Auctions4.6(86)$25(1 bid)Jun 19, 2026
