Lot 478 o
U.S. Proprietary Medicine Co., 6¢ Black, Old Paper, o.g., choice centering, intensely rich color, few small thins, Very Fine and choice appearance, a lovely and 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, Ex-Elliott.Scott No. RS244a $2,500.
Realized: $2,500