Is anyone here knowledgeable in variants of the 1912 issues above.
Buy a copy of the Scott "Identification Guide To U.S. Stamps Regular Issues 1847 - 1934" 6th edition (or later) by Charles N. Micarelli. It contains a great deal of information on the varieties.
Comments
Buy a copy of the Scott "Identification Guide To U.S. Stamps Regular Issues 1847 - 1934" 6th edition (or later) by Charles N. Micarelli. It contains a great deal of information on the varieties.