What Does Repunched Mean

Naturally https://www.coppercoins.com has lots of photos and explanations. RPM is basically when the Mint punched a Mint Mark on the same place more than once. RPM = Repunched Mint Mark.

Not to split hairs, but a coin that bears a different digit punched over an earlier is properly called an overdate. The IHC 1888/7 overdate (Snow-1) is a good example here, as an 1887 die was reused the following year by impressing at least an 8 over the last digit. Repunched dates (RPDs) by contrast are always the same four numerals repunched into the die. This is typically done as a corrective measure when the first impression was discovered to be in an improper position. Typically before the date was corrected, the die field containing the date was ground down to reduce that impression, and then repunched again. This is why only portions of the old date show on the coin, as shown below with this example of an 1894/1894 RPD. To the best of my knowledge, old dates were not filled with new metal because that would not adhere to a hardened working die. If that were the case, we would see different die states where that metal started falling out, revealing the previous date stamping. That just isn't documented--at least with the IHC series.

Here is the 1894/1894 RPD where parts of the old date were ground away (but not completely) before the new date position was impressed into the die. The old top of the 4 gives a hint how far off the original date impression was (NE arrow):

OK...so does this large cent have an overdate or a repunched date?

thanks for the replies and references,guys