1851 Boston MA folded letter to Philadelphia. 3 cent 1851 issue #10, red CDS with integral 3 rate; small paid in circular grid; looks like it’s the magenta shade that was only used briefly in boston. Scarce first month use; vertical file fold impacts stamp. Your satisfaction is guaranteed. See additional auctions under IDs paperhistory and budgetcoverbox. Please consider joining the American Philatelic Society!