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.
Bowers, Q. David. A Buyer’s and Enthusiast’s Guide to Flying Eagle and Indian Cents. Bowers & Merena Galleries, Wolfeboro, NH, 1996
Breen, Walter. Walter Breen’s Complete Encyclopedia of U.S. and Colonial Coins. Doubleday/FCI Press, New York, 1988
Fivaz, Bill and J.T. Stanton. The Cherrypickers' Guide to Rare Die Varieties, 5th Edition, Volume 1. Whitman Publishing, Atlanta, 2009
Lange, David W. History of the United States Mint & Its Coinage. Whitman Publishing, Atlanta, 2005
Snow, Richard. The Flying Eagle & Indian Cent Attribution Guide 1856-1858. Eagle Eye Rare Coins. M & G Publications, Tuscon, AZ, undated
Snow, Richard. Flying Eagle & Indian Cents. Eagle Eye Press, 1992
Snow, Richard. A Guide Book of Flying Eagle & Indian Head Cents. Whitman Publishing, Atlanta, 2006
Taxay, Don. The U.S. Mint and Coinage. Arco Publishing, New York, 1966
Yeoman, R.S., Kenneth Bressett (editor). A Guide Book of United States Coins, 62nd Edition. Whitman Publishing, Atlanta, 2008