The outer part of the reverse face was machined off in some fashion.
They were flattened as well as scraped. Mash any design element and it grows wider.
Your comment makes no sense. Anyway, I see no sign of die deterioration, only damage.
The obverse was removed by a milling machine or similar device.
It's post-strike damage. The letters are flattened and I can see scrape marks on top of them.
Your weights for the normal cents are way off. A copper-plated zinc cent should weigh 2.5 grams. Your "error" coin looks entirely normal. All...
It would be an error, IF it is genuine and IF it is underweight. Inspection and measurements of the edge are unreliable, as this varies according...
Somebody modified the edge outside the Mint. Looks like it was ground smooth and plated over. Either that or it's a counterfeit meant to circulate.
It's impossible to identify the source of the damage or when it occurred. But damage is damage. Any damage that occurs after the strike is not...
Post-strike damage. Impacts from the side have pushed metal from the rim over onto the field.
Such errors are difficult to authenticate in the best of circumstances. Once oxidation has set in the job is much tougher. If your coin has...
If its diameter is the same or less than a normal quarter, then it's been tampered with.
Specifically, it is a "rim cud". A piece broke off the rim gutter of the die.
Could be a generic capped die strike. Impossible to say for sure without a photo.
You should also mention the weight (it will be normal).
It is a repunched numeral.
On these Colombian 1 centavo coins it's hard NOT to find a repunched date. Some show drastic separation.
It's machine doubling. Very common on S-mint cents from 1968 - 1972.
It's not an error. It's an encased cent (lucky token cent). It was formerly ensconced in a ring bearing an advertisement or some other message.
A few years ago you could pick these up for between $50 and $75. So the price has more than doubled. I even vaguely recall one selling for close...
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