Washington Head:
Denomination in Numerals: 3¢: Imperforate
Washington Head 3 CENTS
Imperforate
Flat
Plate
Offset
Method of Printing
To make it
easy on yourself, once you have determined that the stamp is imperforate,
next determine the method of printing, either the flat plate
or offset method. The 3¢ stamp was not issued imperforate
using the rotary press method.