NTSS 2011 - Show Cover - Mark Twain First Day of Sale

Commemorating American Author, Mark Twain, this cover features the 2011 Mark Twain Forever stamp and the NTSS Show Postmark from that year. Issued in conjunction with the National Topical Stamp Show, this cover honors both the author and the State of Wisconsin. Cancellation date is the first day of sale. The price includes domestic (US) postage. Exact positioning and density of cancellation may vary.