What it is
An overdate shows one date punched or hubbed over another, usually because the Mint reused a die from the previous year.
What causes it
Dies were expensive, so old dies were sometimes repunched with a new date.
How to identify it
- Traces of the earlier digit show around or inside the new one.
- Most overdates are in the final digit.
- Common in early American coins and in a few famous 20th-century issues.
How to tell it from damage
Die chips and damage can mimic an underlying digit. Compare with certified examples.
Famous examples
How overdates were made in the early Mint
In the early decades of the US Mint, dates were not part of the hub. Each working die had its date punched in by hand, at first one digit at a time and later with a punch carrying several digits. Dies were hand made and costly, so when a die from one year was still serviceable as the year changed, a worker could punch the new final digit over the old one and keep the die in use. The old digit was rarely removed completely, so its outline shows around or inside the new numeral.
Early federal coinage includes many of these, such as the 1824/2 quarter. Later 19th-century examples include the 1888/7 Indian Head cent and the 1880/79 and 1887/6 Morgan dollars, produced while dates were still punched into working dies by hand.
Hubbed overdates of the 20th century
Once dates were included in the master hub in the early 1900s, a different kind of overdate appeared. Working dies still took several squeezes from a hub. Near the turn of a year some dies already hubbed with the old year's hub received a squeeze from the new year's hub. The result is an overdate formed by hubbing rather than by a punch, which makes it technically a type of doubled die.
The famous 20th-century overdates were made this way: the 1918/7-D Buffalo nickel, the 1918/7-S Standing Liberty quarter, the 1942/1 Mercury dime from Philadelphia with its Denver counterpart the 1942/1-D and the 1943/2-P Jefferson nickel. On each, the underlying digit is seen at the final numeral, such as the diagonal of the 7 running through the lower loop of the 8 on the 1918/7-D nickel.
Overdates compared with repunched dates and doubled dates
An overdate has a different digit under the final one. A repunched date has the same digit punched twice, slightly out of place, such as an 8 over 8. Repunched dates come from hand punching, just like repunched mint marks. They are cataloged separately.
A third look-alike is the doubled die date, where the whole date is doubled by hubbing and every digit shows the same spread. The 1955 doubled die cent is an example and is not an overdate, because each digit is doubled with itself.
How to examine a suspected overdate
Start by checking whether an overdate is listed for the date and mint. Most overdates are well documented and the reference will tell you which digit to study and what traces to look for. Under a 10x loupe, look inside and around the final digit for parts of a different numeral: a stray curve, a crossbar, an angled stroke or a flat top that does not belong to the visible digit.
Check that the underlying traces are raised and part of the struck design, with the same luster and texture as the visible digit. Then check die markers listed for the variety, such as cracks or polish lines nearby. Each overdate came from a small number of dies, so genuine examples share these markers.
Grade matters a great deal. On worn coins the underlying digit fades along with the rest of the date, so an overdate can be hard to confirm on low-grade examples. Compare your coin with photos of certified examples in a similar grade.
Damage and alterations that mimic overdates
Die chips and die cracks inside a numeral can look like the stroke of another digit, but they are random and do not form a numeral shape. Post-mint scratches inside a digit are cut into the coin rather than raised. Some fakes are made by engraving lines into a normal coin to imitate an overdate. Under magnification those lines are sharp-edged grooves with displaced metal along their sides.
Because the 1918/7-D nickel, the 1918/7-S quarter and the 1942/1 dimes carry strong premiums, altered and counterfeit examples exist. Collectors usually buy them certified by a major grading service.
Counterfeiters sometimes alter a common date instead, for example by tooling the final digit of a normal 1918-D nickel. A tooled digit shows file marks, a slightly sunken field around the numeral and a shape that does not match the genuine overdate die.
How overdates are graded and attributed
Grading services list attributed overdates as part of the date on the label, such as 1942/1. The overdate is treated as a separate variety from the normal coin of that year. Its premium depends on grade and on how clearly the underlying digit shows, so a sharp example with an obvious underdigit is the most desirable.
Frequently asked questions
What causes a overdate?
Dies were expensive, so old dies were sometimes repunched with a new date.
How can I tell a overdate from damage?
Die chips and damage can mimic an underlying digit. Compare with certified examples.
What is an overdate on a coin?
An overdate is a coin whose date shows one digit over another, usually the previous year's final digit under the new one. It was made by reworking a die from one year for use in the next.
How can I tell if my 1942 dime is a 1942/1?
Look at the 2 under a 10x loupe for raised traces of a 1 beneath it, then compare with images of a certified 1942/1. The overdate is known from Philadelphia and Denver.
Are there modern overdates?
Overdates are rare after the 1940s. The 1943/2-P Jefferson nickel is one of the last famous examples and later dates are known mainly for doubled dies instead.