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Collectable Forms of Doubling

While this list is not comprehensive, some of the most collectable forms of doubling are represented in the photos and descriptions below. You will notice they all involve the re-entry of a design into the die (through one manufacturing method or another) that results in one image overlapping onto the other. Each image is a entity of its own and not dependant on an earlier image from which to be formed or "smashed down" from, etc. In many cases you will note distinct areas of separation between the images even if only in the finer details such as the serifs of characters. Study the photos below and compare them to the "Other Forms of Doubling" to learn the difference.  Or bring down to Calaveras Coin & Pawn and see if they are worth cold hard cash.  Let us help you liquidate unwanted change.

 Nice hub doubling showing on IGWT of a 1946 Roosevelt dime. Coin courtesy of W. W. Edwards who first reported discovering the variety back in the mid 1970s.
 An outstanding example of hub doubling on TRUST found on a 1974-D half dollar. Notice the strong spread and areas of distinct separation.
 One of my favorite Repunched Mint Mark varieties on a 1960-D Large Date cent. Listed as RPM#13.
 A nice example of a quadruple punched Mint mark on a 1945-P Jefferson war-time nickel. Notice the trace of the lower loop down to the south of the main lower loop and other areas of doubling with separation of images. Coin courtesy of Jerome Goodman. Listed as RPM#45.
 Here's a great example of a Repunched Date on an 1882 Indian Head cent showing as an 88/88 with the tops of the secondary 8s found within the upper loops of the main characters. Coin courtesy of Larry Briggs.
 A rare example of "Touch-up Engraving Doubling" on the eagle's tail-feathers on a 1953 proof Washington quarter. Notice that the original feathers were polished down so far that they virtually disappeared. They were crudely re-entered into the die as a series of new tail-feather outlines with distinct overlapping of the old and the new tail-feather outlines most easily viewed at the lower edge. 

Some mistake coins aka "error coins" can mean serious cash.  

Bring them on down to Calaveras Coin & Pawn. (209)736-COIN