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Perhaps the OP thinks their quarter is an experimental alloy. (They contained manganese, not magnesium, as far as I can determine).

Worth a second look but appears to be a linear plating bubble, same appearance and orientation as all the other ones on Abe's face. The discoloration around it adds to the effect.

Oh it's more than just waterfront. It's NEVER SEEN BETTER$$.

You've blown close to a grand, that we've seen, on this seller, with juiced/deceptive photos, after posting a bunch of garbage on here and getting told it's garbage. I don't know what to say except I have some real estate for sale.

https://www.ebay.com/itm/1883-PROOF-INDIAN-MOST-INCREDIBLE-RED-PR-CAMEO-NEVER-SEEN-BETTER-NR-05637-/392866739650?hash=item5b78aeb5c2%3Ag%3ArWIAAOSwUtFfBlSN&nma=true&si=0wAYp83tSgInXjsSCPDMFKEUBd8%3D&orig_cvip=true&nordt=true&rt=nc&_trksid=p2047675.l2557

Here's mine (on the right) I got from grandpa as a kid, probably circulated, definitely cleaned (I did it myself at 13). I noticed the... still, could be images, die wear, strike.

I guess I'll PM you. People on here believe that specific details helps fakers. I don't buy into that because I think they're lazy, but I'll respect it.

I love the design on this coin, have one since childhood. Hate to ask, but how did you acquire it? Are you sure it's authentic? Could be the photos but some stuff seems off.

Obverse looks about XF to me, as such not worth the cost of grading. Reverse is better. Price guide says $30 in XF40. Worse looking examples (to me anyway) have sold in the $40-50 range on ebay. Lots of junk on there; yours is a nice example.

I don't consider "accurately grading" and "autopilot" to be opposed to one another. If you're good at what you do, you can be on "autopilot" all the time. An airplane on autopilot doesn't just screw up and crash. That's why it's called autopilot.

At my old company they called it being "shuttered", as if they'd ever just open the shutters again. My schmuck "boss" (at least, he thought he was) approached me on axe day and offered to help me find a job, like some benevolent overlord whose ring I could kiss. I said nah, I'm going back to my old team on Monday. The look on his face was priceless. I wonder what this housecleaning in Philadelphia was all about. Doesn't seem like they could just stop making coins. There was a short recession in 1869.

Some robot dredged up a 6 year old thread to spam their BS website because it has "law" in the title.

Nice to see things haven't changed much. Congratulations, those "requested to remain", you now have three jobs!

I can imagine something like this could easily churn through all the ASE type stuff assigning 68, 69, 70, CAM, DCAM, and the like. My comment "something like LIDAR" is just what you're talking about, but you have way better knowledge about what that would entail.

If it really was this seller, the neutral and negative feedback complains about their deceptive images, juiced photos, and things like their SUPER PROOF CAMEO BEST EVER coins coming back AU Details from a TPG. I'd have to guess it might be the case here, and PR Details for this coin have sales around $300. Half what was paid.

Looks like a "China 1 cash" but there's over a thousand kinds. Could also be a replica. https://en.numista.com/catalogue/chine_empire-1.html

Not sure what the goal of your research is, but this article, a bit tangential, has some tidbits. Mutilated coins recovered from scrapping cars, washing machines, vending machines, etc - one company alone, $3.2 million in 2014 and 2015. Article indicates they get paid by the pound in various denominations. https://www.vice.com/en_us/article/xw4e5j/coin-recycling-damaged-mint-china-fraud This says they have to be bagged by "denomination category". https://www.usmint.gov/news/consumer-alerts/mutilated-coin-program So if they're writing somebody a check, it seems like there must be a record of how many pounds of each "denomination category" they paid out for, but it's not clear to me what the categories are. The program was suspended for a while and it appears to be suspended again. Perhaps you're already aware of all this.

Looks like they would be eligible for the additional "Struck in [year]" attribution. It's interesting because it seems like the same coins could be eligible for like 4 or 5 different labels.

I'm sorry, but first of all, because it's you posting it. You don't exactly have a stellar track record on here. Second, it looks like it's fresh out of a "private mint". In my observation, 130 year old silver just doesn't look like that. Third, I don't care how shiny and flashy it is. Post clear, focused, cropped images straight above the coin instead of all these bouncy videos. We get it, it's shiny. The date doesn't look right, but who can tell? Lastly, tell us where/how you got it and how much you paid. Those are important clues. Are those in-car photos of you driving home from some craigslist hookup, or a reputable dealer? It helps to know that.

Wow, that's incredible cameo on that counterfeit. Let us know what it grades.

As a layman this surprises me. It sounds like a database issue (I browsed thru your linked article). "Coinoscope" on my phone does a very good job of identifying the general series of coins. No problems picking out a Barber dime regardless of camera orientation, obverse or reverse. Once you've identified "Barber dime", you know exactly where the date is on an image, and there are 25 choices. If Facebook can pick out my face in a picture, it doesn't seem like a big deal to identify the date on a coin. Am I missing something?

Like colds and flu? I do appreciate hopeful/wishful thinking, but I think we'll be dealing with this for a long time. I suspect it will mutate to be less fatal (quickly killing your host is not a good strategy), and we'll tweak the vaccine every year like we do with influenza, but we're its reservoir now. A wildly successful life form doesn't just burn itself out. Humans arguably are wildly successful. It took us 100,000 years to populate every corner of the planet. This virus did it in 6 months. Think about that! Stamping out smallpox took generations and an international effort. I've only been to a few minor local coin shows, so it's not a big deal to me in that regard, but I sympathize with others.

I'm still curious what defines "golden era". It implies a period that somebody has already decided has the best designs, whether I agree or not. I would have put buffalo nickel in the top spot, given the choices, even though it's a bison, not a buffalo. The Native American is real instead of some hokey Caucasian Indian princess with a war bonnet, the bison is one of my favorite animals, and the depictions on both sides, given a good strike, to me are phenomenal. Wheat cents are downright boring. We're all sick of wreaths of vegetation by 1909. I don't know why it even makes the list. The Peace dollar portrait's expression always struck me as vacuous and oddly pseudo-sensual. I love the eagle on the reverse though. It still amuses me that they had to tell her to cover up on the Standing Liberty.

What's the definition of "golden era"?

That paper is interesting. I kind of chuckle that the authors have mathematical equations for grading, but I suppose they have to, for the analysis. I've mulled this over for years, and it seems like rather than pixel/image analysis, it could be something like LIDAR. Map the coin in 3D and compare to a "perfect" reference. I suppose that would be good for counting up dings and scratches, but have problems with weak strike versus wear, etc. ATS bought into some kind of optical focusing technique similar to this when attributing a pattern as "high relief" last year, and it didn't end well. There would be a lot of bumps in the road, and as gmarguli says, maybe not cost-effective.