Error Die Clash/Break | Exogenous floating die clash

[mustbebob]

There is a reason why you should always check every coin you get your hands on. Even after 53 years of searching, I still search when I can and in a recent case, it paid off.

For those of you who have a subscription to Coin World, an article by Mike Diamond was released today on a coin I found a short while ago. The title of 'Exogenous floating die clash' tells you what it is, but it is a very uncommon find. I can not post his article, but here is the link to what it is:

https://www.error-ref.com/?s=floating+die+clash

I will include a photo of the coin I found and if you know of anyone who gets CoinWorld, you can ask them to send you a copy of the article on page 43. It is very exciting to find something relatively scarce or rare, especially on a coin that is 50 years old.

I was told I can finally announce the find. I hope you get a chance to read the article!

[Roller]

Congarats on the find Bob.

[Petespockets55]

Thanks for sharing the find and image.

From the link- "... Those transferred elements are raised and normally-oriented on the die face. Every coin that is struck afterward has incuse, mirror-image design elements ... "

I guess I'm confused here because the "extra" rim through NIT seems raised, not incuse.

[joel]

Very cool find Bob!! Thanks for sharing!!

[mikediamond]

An exogenous floating die clash is created by a die fragment that doesn't originate from either of the dies that struck the coin. It could have bounced over from a neighboring striking chamber or it could be a fragment that broke off a previously installed die that happened to lodge in a die recess until a new die was installed. In this 1972-D cent, we have what is most likely the impression of another reverse cent die that collided with the reverse die that struck this cent. The ridge represents the impression of the peripheral field. Since the peripheral field leaves a recess in the die face, the corresponding feature on the coin will be a ridge. The tops of two incuse letters appear and define the concave margin of the ridge. I can't identify the letters, but they certainly do not match anything on the obverse die.

[TPring]

Nice, rare find.

The explanation for how this happened sounds so fantastical and absurd - that [somehow] a piece of another die jumped over and made an impression in this die. Please, but it's a news-maker.

[hasfam]

Very exciting Bob. Congrats.

[makecents]

Excellent find, Bob! Congrats on the discovery and write up!

[Petespockets55]

.... Since the peripheral field leaves a recess in the die face, the corresponding feature on the coin will be a ridge...

Thanks Mike, that confirms what I thought I was seeing.

My question regarded the definition on error-ref.com :
" ... Every coin that is struck afterward has incuse, mirror-image design elements ..."

Isn't "ridge" the opposite of "incuse"?

I seem to be misunderstanding something here?
Thanks for all your help comprehending this.

[mikediamond]

The other explanations I supply in my article are even more "absurd". As Sherlock Holmes said, "When you have eliminated the impossible, whatever remains, however improbable, must be the truth". Occam's Razor as well favors my preferred explanation.

Nice, rare find.

The explanation for how this happened sounds so fantastical and absurd - that [somehow] a piece of another die jumped over and made an impression in this die. Please, but it's a news-maker.

[Petespockets55]

I'm not sure what is so unbelievable about this possibility when each mint press has four die pairs working in close proximity to each other.
("four in one" is part of the reason they can pump out 720 coins per minute/60 seconds = 12 per second/4 pair = 3 coins per second per pair)

[mikediamond]

Thanks Mike, that confirms what I thought I was seeing.

My question regarded the definition on error-ref.com :
" ... Every coin that is struck afterward has incuse, mirror-image design elements ..."

Isn't "ridge" the opposite of "incuse"?

I seem to be misunderstanding something here?
Thanks for all your help comprehending this.

Alphanumeric design elements ARE incuse and mirror-image, as they are recessed on the die face. They leave a faint raised image on the opposite die when they clash. However, the field is NOT recessed. In a tilted and misaligned die clash, the field is driven into the field of the opposite die, generating a curved groove. This will naturally leave a curved ridge on every coin struck afterward.

[willbrooks]

What are the black arrows pointing to?

[willbrooks]

An exogenous floating die clash is created by a die fragment that doesn't originate from either of the dies that struck the coin. It could have bounced over from a neighboring striking chamber or it could be a fragment that broke off a previously installed die that happened to lodge in a die recess until a new die was installed. In this 1972-D cent, we have what is most likely the impression of another reverse cent die that collided with the reverse die that struck this cent. The ridge represents the impression of the peripheral field. Since the peripheral field leaves a recess in the die face, the corresponding feature on the coin will be a ridge. The tops of two incuse letters appear and define the concave margin of the ridge. I can't identify the letters, but they certainly do not match anything on the obverse die.

Mike, there's something bothering me that I can't resolve withan your explanation. Why, if this is the impression of the die's peripheral field, that we see both edges of this "field " well defined into the striking die, when it is, of course, only present on the offending die's interior curve? If anything, it appears stronger on the outer curve, which wouldn't hit the die at all, or at least not nearly as strongly, and hard to imagine if tilted enough to do so, would leave other interior remnants as you noted. Hope my question is understandable. I'll be happy to elaborate further. Thanks.

[mikediamond]

What are the black arrows pointing to?

This is Bob's image and he's responsible for the arrows. I assume they're just pointing to the curved ridge.