Lot 1793 o
U.S. Proprietary Medicine Co., 6¢ black, old paper, well centered, thins and small sealed tear at bottom, Very Fine appearance, very rare mint example of the U.S. Proprietary Medicine Co. 6¢ Black on Old Paper, only twenty examples recorded in the Aldrich census (twelve are faulty).Scott No. RS244a $2,500.
Realized: $1,600