Scott 17, 12c Black, large margins, crisp shade and bold impression, with blue town cancel. Please visit my store for more items. LOTS ARE ALWAYS COMBINED FOR MAILING. We will attempt to answer all questions to the best of our abilities. Get a free last minute reminder! Select One or Both Alert Types. Send me a text message and/or. Opens a secure window. The item “U. S, 1851. 17c Black, P. F. Cert, Used” is in sale since Friday, March 24, 2017. This item is in the category “Stamps\United States\19th Century\ Used”. The seller is “login1″ and is located in West Coast. This item can be shipped worldwide.