The final series of the card proofs are the issues of 1885. For the first time in the card proofs, a one cent is added to the line-up. The other issues are the same designs and denominations as previously used, once again in a slightly different color.
The following information is provided for this series:
Brazer, Clarence W. “Essays for U.S. Adhesive Postage Stamps”. Lawrence, MA: Quarterman Publications. 1977 (Reprint of the 1941, 19425, 1943 and 1947 editions copyrighted by the American Philatelic Society).
Brookman, Lester G. “The United States Postage Stamps of the 19th Century, Volume I, 1847- 1860”. North Miami, FL: David G. Phillips Publishing Co., Inc. 1989. (Reprint of 1947 edition copyrighted by H.L. Lindquist.)
Brookman, Lester G. “The United States Postage Stamps of the 19th Century, Volume II, 1861-1882”. North Miami, FL: David G. Phillips Publishing Co., Inc. 1989. (Reprint of 1947 edition copyrighted by H.L. Lindquist.)
Brookman, Lester G. “The United States Postage Stamps of the 19th Century, Volume III, 1883-1898”. North Miami, FL: David G. Phillips Publishing Co., Inc. 1989. (Reprint of 1947 edition copyrighted by H.L. Lindquist.)
Lee, James E. “Earl of Crawford 30-Cent American Card Proof Sheet Acquired”. In James E. Lee’s Philately, Vol. V, No. 5 – Whole No. 22. Cary, IL: James E. Lee. 2001.
Lee, James E. James e. Lee’s Philately, Vol. XV, No. 3 – Whole No. 67. Cary, IL: James E. Lee. 2013.
Luff, John N. “The Postage Stamps of the United States”. The Scott Stamp & Coin Co., Ltd. 1902. (Copyright 1897-1937 by The Scott Stamp & Coin Co., Ltd. This was a compilation of a series of article originally presented by John Luff in The American Journal of Philately, starting in June, 1897, and as the introduction explains was presented “…in a more permanent form.” with this publication.)
Snee, Charles, ed. “Scott Specialized Catalogue of United States Stamps and Covers,” Sidney, Ohio: Amos Publishing. 2012.
Vaupotic, Greg. “Thickness of the Cardboard Proofs by Printing”, 2003. (Originally published in the United States Stamp Society Journal, January 2003. Original copy of the paper provided by the author via email on January 6, 2013. Internet, located at https://bay180.mail.live.com/?tid=cm_AT5WF1Y4hGdTgAhWtc7CA2&fid=flqDLKkjEjkaTlY1n7X9BPQ2&paid=cmpF3MI1zI4hG5FwAiZMJM8A2&pad=2013-05-29T12%3A34%3A48.153Z&pat=2&pidx=2. Accessed January 6, 2013.)
Waldecker, Gregory P. “Card Proof Images”. All images are part of the author’s private collection. Originally produced by the Continental Bank Note Company, American Bank Note Company and the Bureau of Engraving and Printing for distribution by the U.S. Post Office Department (1875-1895).