U.S. Patent Office and Blacksmith. Multicolored dual panel Magnus patriotic design on cover to Groton, N.Y., franked with 1861, 3¢ rose canceled by target handstamp with "South Owego, N.Y., May 10" cds tying stamp, Extremely Fine, an scarce Magnus design in choice condition. Scott No. 65  Estimate $750 - 1,000. $0 (Image)