1879 Mexico 25 Centavos

[Ronald Ozimek]

The back of this coin is unremarkable but the front has a lot going on. There is an unusually large margin at the rim around 11:00. The big blob in the center is the high point of the coin and it touches the table when resting on it. Do you think a large part of the die broke off creating this unusual blob?

[occnumis2021]

looks dinged/pinched, thus pmd.

does the edge look the same in that spot as the rest?

[Ronald]

The back of this coin is unremarkable but the front has a lot going on. There is an unusually large margin at the rim around 11:00. The big blob in the center is the high point of the coin and it touches the table when resting on it. Do you think a large part of the die broke off creating this unusual blob?

Hello, when I first saw this it reminded me of an article I read that talked about why people back in the old days drilled holes in coins. In that article it went on to talk about many ways coins are used. I am sure you probably already know all of this, but your post did make me think of this and a possibility to explain the mount. Just thought I’d share…maybe it was used as a button, is a button, or had away to fix it to something so it would not be lost…and then again maybe not.

[Ronald Ozimek]

The reeding on the edge is complete and unaffected by the abnormality near the rim. Would this be considered struck out of the collar at this edge? (Assuming they used collars in the 1800's). Or would an out of collar strike cause problems on both sides of the coin? Thanks!
Thanks also for the comments on drilled/holed/jewelry coins.

[occnumis2021]

not struck out of collar or tilted/partial.

out of collar is broadstruck.

[Ronald Ozimek]

I measured the coin diameter at the point with the widest part of the rim and the narrowest point and uploaded the photos. It does not seem drastically different for a circulated coin of this vintage. Is the possible reason for the unusually wide margin on only 1 side of the coin that the hammer die was not centered to the anvil die when it was struck?

[occnumis2021]

when a coin or collar is tilted, you will see other effects, especially with the reeding.

a coin can take on oblong properties when not struck properly for a variety of reasons but you coin does not resemble any that i've seen out of the thousands i've seen of different denominations. fwiw

[Ronald Ozimek]

I'll put this in the "Guess we will never know" category. Over the winter I have been reading the Error-ref.com website page by page. I'm 75% complete. There is much to learn from Mr. Diamond & his friends on the many things that can go wrong during the coin manufacturing process.

[Ronald]

I'll put this in the "Guess we will never know" category. Over the winter I have been reading the Error-ref.com website page by page. I'm 75% complete. There is much to learn from Mr. Diamond & his friends on the many things that can go wrong during the coin manufacturing process.

With that knowledge, Being able to envision what happens after the mint and separating them is the challenge. GL