What is a repunched mint mark on a coin?
How repunching happens
Mint marks were added to dies by punching a small letter into the die surface. If the punch was struck twice, or was moved and struck again, the mint letter appears doubled or heavier on coins from that die. The two impressions are often offset slightly, which gives a shadow or extra outline.
Repunched mint marks are most noticed on older series where the mint letter is small. Collectors often study these details because a repunched mint mark can separate one variety from another within the same date.
- Mint mark punched into the die more than once
- Shows as a doubled or thickened mint letter
- Common on several older series
- Can separate one variety from another
Checking your coin
Use a magnifier to compare the mint letter with a normal coin of the same date. Look at the serifs, the edges of each letter and any shadowing to the side. A clear offset in more than one part of the letter is a strong sign of repunching.
Wear, grease and a weak strike can also make a mint mark look doubled. For a confident answer, compare your coin with photos in a reference guide, and ask a dealer or grading service if you are unsure. Keep a simple record of each coin's date, mint mark, grade and source so you can review your estimates later.
Common mistakes
- Confusing a weak strike or wear with a true repunched mint mark.
- Cleaning a coin to sharpen a mint mark, which can damage its surface and value.
