The most common die cap is a obverse die cap. This is because the obverse die is the hammer die. The obverse die moves downward to strike the reverse die on most coinage presses. The more times the coin is struck, the more the metal from the coin moves up and around the die. Some can resemble a bottle cap, thus the term die cap.
MS 65, 66, or 67 coins are very hard to find in die caps. Remember, these are coins that are struck repeatedly by the die. Most coins are damaged and do not grade above MS 63 or 64.
Here we will show you two different die stages of a reverse die cap.
Now and then a coin will stick to a die and be struck several times with a die.
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Notice the enlarged image of Lincoln. This is from the repeated striking of the obverse die. On the reverse of the coin, you will notice the metal has moved upward around the die.
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| Broadstruck | Clips |
| Die Clash | Die Cap |
| Double Denomination | Double Struck |
| Flip Over | Multi Struck |
| Mated Pair | Off Center Struck |
| Wrong Planchet |