FOR SALE 2 SIDED ORIGINAL SINCLAIR AIRCRAFT PORCELAIN SIGN.... The item "ORIGINAL SINCLAIR AIRCRAFT 48 PORCELAIN SIGN" is in sale since Friday, March 13, 2020. This item is in the category "Collectibles\Advertising\Gas & Oil\Merchandise & Memorabilia\Signs". The seller is "62usmc" and is located in Chillicothe, Ohio. This item can't be shipped, the buyer must pick up the item.