1861 (c., Mar. 4) Gorham Me. to St. Petersburg, Russia, Pierce correspondence cover bearing 1¢ blue (24) and 12¢ black (36) pair and single, all cancelled by manuscript, black "Boston Br. Pkt. Mar 5" exchange backstamp and red crayon "14" credit rating, endorsed by "Prussian Closed Mail", carried by Cunard Line America from Boston Mar. 6th to Queenstown arriving Mar. 16th, red "Aachen Franco" (3.19) framed transit and magenta "fr 3" sbr rating; couple trivial perf flaws, Very Fine, ex-Emerson; with 1981 P.F. certificate. Estimate  $2,000 - 3,000. A REMARKABLE USE AT THE 37¢ PRUSSIAN CLOSED MAIL RATE TO RUSSIA. The 37¢ per ½ ounce Prussian Closed Mail rate to Russia was effective Oct. 1, 1852 to Apr. 30th 1863. $0 (Image)