In 1969 Jim Ruddy purchased a small cache of Indian Head cents found in an attic of a mansion in Virginia. These had never been examined by a numismatist. Jim had been interested in die varieties for a long time, and over a span of years had discovered several remarkable items, one of which was a new die for the 1786 Date Under Plow Beam New Jersey copper, a classic in that series.

Studying his newly acquired group of Indian Head cents by examining them under low-power magnification, Jim noticed that one bearing the date 1888 seemed to have traces of a 7 under the last digit. Could this be? No one had ever heard of such a thing!

Jim placed the coin under a microscope, and the small 7 became even more clear-and unequivocal. Although Indian Head cents had been a popular series for many years, no one had ever identified an 1888/7 overdate! He noticed that on the left obverse rim at the 9:00 position there was a break, caused by a piece falling out of the die. Likely, this die had been retired quickly, accounting for the coin's rarity. Marvelously, his coin was in Mint State.

Lo and behold, a few coins later in the same collection, Jim came across another 1888/7, also in Mint State! Keeping his discovery secret, Jim looked at every other 1888 cent he could find, at shows and in several dealers' inventories. Not another piece came to light. The announcement of the discovery was made in early 1970, and Numismatic News, Coin World, The Numismatist, and other periodicals described this amazing addition to the Indian cent series.

Jim watched and waited to see whether other coins, perhaps thousands (as in the case of the 1938-D/S nickel), would be discovered. Few were. By 2006 only four Mint State 1888/7 were known, including the two that Jim discovered which originally went to collector Robert Marks and dealer Julian Leidman and, since then, have changed hands several times.

Today, experts estimate that 500 to 600 specimens exist mostly in the low grades of Good and VG with some in AU grades. In 2018 Stack's Bowers Galleries sold an AU-58 (PCGS) 1888/7 Indian cent at auction for $26,400.

In 1958 Dr. William H, Sheldon wrote in Penny Whimsy:

Seeing is believing, but it may not tell the whole story. If I attend a symphony and do not see Jones, he still might have been there. It is just that he did not catch my eye. If in my yard a visitor sees no wild deer, he cannot conclude that none are around, for the next morning I may see five of them nibbling on the grass. First, if a coin is actually seen, then it does exist. However, if it is not seen, it still might exist. Today, there are many valuable coins that exist but are not known to numismatists. Some of these will be discovered, to delight future generations.?

To read the complete article, see:
Jim Ruddy's Remarkable Find(https://www.stacksbowers.com/News/Pages/Blogs.aspx?ArticleID=1888-over-7-inbdian-head-cent-rarity)