Reproductions are usually made to fill a specific area, such as a frame or a specific page size, so they generally will not be the same size as an original.
If prints are a modern (standard) size, say 8" x 10", or 8 1/2" x 11," or 11" x 17" be wary.
Currier & Ives used a sturdy rag paper, a bit heavier than modern construction paper in weight and feel.
Paper for large folios is heavier and stiffer still, almost like lightweight card stock.
Conningham" is the preferred collector's reference, and a must-have if you're going to be buying, selling or collecting Currier & Ives lithographs.
You'll know it's not authentic if you see the name of any other printer or publisher (often with a modern copyright � symbol), or an address other than New York, a 20th century date, or words such as reprinted from, republished by, from the collection of, courtesy of, or from (or after) an original by.
If it looks "too perfect," examine the picture closely. Rare is the dealer or serious collector who hasn't paid for the "education" that a knock-off provides.
It could be that the "patina" is imparted by colored paper or printing, which means a reproduction. Yes, a good conservator can peel years off the appearance of many an old print, but you are most likely to acquire conserved prints from a dealer, top-flight auction house or serious collector, not from a country sale, flea market or the walls of departed relatives. These teachers generally come in the form of re-strikes from the original lithography stones, good reproductions, and fakes intended to deceive.On a Currier & Ives original you will generally find: For some of the following steps you'll need a reference book."Currier & Ives Prints, An Illustrated Check List, by Frederic A. Gary Kunkelman, a noted dealer of American historic prints and maps, has been kind enough to prepare the following primer on the identification of Currier & Ives originals for the Currier & Ives foundation. Numerous reprints, copies and forgeries have been produced in the years since the firm closed, making Currier & Ives lithographs some of the most reproduced images in history. in American Civilization from The University of Pennsylvania, where he studied early American prints and printmakers, and has been collecting Currier & Ives lithographs for nearly three decades. Currier" and "Currier & Ives" issued more than 7,000 different print titles during their history.The good news for collectors is that most reproductions are not that hard to identify.