USA #491 Very fine used rare coil pair with perfs naturally trimmed at left from dispensing vending machine, with certificate. For Oversized Lots i. Sheets, Large Covers, Etc. The item “USA #491 VF Used Rare Coil Pair With Certificate” is in sale since Monday, June 20, 2016. This item is in the category “Stamps\United States\19th Century\ Used”. The seller is “citystampmontreal” and is located in Montreal, Quebec. This item can be shipped worldwide.