VarietyPlus service is also available for coins already encapsulated by NGC.
For coins where the fee column is blank, no VarietyPlus charge is required to
have your coin designated during grading. For coins marked $15, a $15 surcharge
applies to the tier fee during grading, or a $15 fee applies to have the VarietyPlus
designation added to any coin already graded and encapsulated by NGC.
Fivaz, Bill & J.T. Stanton. The Cherrypickers' Guide to Rare Die Varieties, 5th Edition, Volume 1. Whitman Publishing, Atlanta, 2009
Flynn, Kevin. Getting Your Two Cents Worth. Kevin Flynn and Robert Paul, Rancocas, 1994
Flynn, Kevin. Flying Eagle, Indian Cent, Two, Cent, Three Cent Doubled Dies. Stanton Publishing, Savannah, GA, 1999
Kliman, Myron. The Two-Cent Piece and Varieties. Numismatic Enterprises, South Laguna, CA, 1977
Leone, Frank. Longacre's Two-Cent Piece Die Varieties & Errors. Published by the author, 1991