EagleRJO

It "def" doesn't match known DDOs for that cent, and in fact I don’t see any doubling at all. Let me guess, you saw a vid on the 1909 VBD cent DDO having some value and figured you could just pull one out of a change pile.

If the weight is correct if may just be a discolored coin. I don't think you got good info from that coin shop and would take it to a different one that has an XRF tester to check composition and maybe recheck the weight.

It looks like a 1961-D 1C RPM-001 or FS-501 repunched mint mark to me, although due to the condition not much added value. It is a nice circulation find to put in a flip and add to a miscellaneous error/variety box. That does look like a Stage D/E die break as a marker for an FS-501. Variety Vista has an image of this. http://www.varietyvista.com/02b LC RPMs Vol 2/1961DRPM001.htm

The technical term for that one is a "Parking Lot Coin".

I thought "POS" was the lowest grade which doesn't even register on a TPG scale.

The "L" was normally very close to and sometimes touched the rim for that coin, with other examples in various grades here ... https://www.pcgs.com/coinfacts/coin/1964-d-1c-rd/2893

The chances of finding a copper 1982-D SD cent are virtually zero, so I will bet the family ranch they are large dates or platrd zinc that weighs about 2.5g.

The pics are a little blurry but it does look like some form of "worthless" machine doubling. You can tell for sure with the coin in-hand using the attached graphic and info at the following site ... https://doubleddie.com/144801.html In the future rest your hand on something when taking pics and then crop them around the coin to improve the resolution.

It does look like just a damaged cent, including a hit at the "LI" of Liberty which displaced the "L" towards the rim given the coin is 95% copper which is a soft metal. It's sometimes difficult to identify what caused specific damage as you never know what a coin has been through, like ending up in a parking lot or on an industrial floor which someone maybe decades later picks up. I would focus more on finding better condition coins in the future.

The old adage is "know the coin before you buy the coin". I would start with some basic coin references such as the Red Book and ANA Grading Standards, and then read up on the coins you are interested in such as with the attached book on Barber coins by Bowers. And stick with coins already certified and slabbed until you gain a significant amount of experience. I have found Great Collections auctions to be a good source at reasonable prices in general.

It does look like what you are seeing is "worthless" machine doubling since it appears to be step-like having a lower secondary impression, with a lack of any notching at corners. However, due to the single squeeze hubbing process for modern dies, true doubling for coins like your 2023 quarter can be hard to identify. The best way to identify this is to examine the coin while turning it with some magnification using the attached infographic and info at the following link as a guide. https://doubleddie.com/144801.html

I was not aware that coins are manufactured with dark discolored areas, and therefore these could not be a buildup of dirt or grime, or that slight raised areas of a coin separate and distinct from design elements, with no possible listed RPM or DDR matches, could not be die chips. I also didn't realize you did not want opinions which might vary from yours which should have been anticipated. You learn something new every day.

Looks like just wear and schmutz in those areas combined with a hit and maybe minor die chips if it's solid and raised. No added value.

The factors are if a grader sees signs of cleaning. Beyond that doing some research on cleaned coins might help to understand this. About reports, I would think the vast majority would not want to pay significantly more for grading so that a report can be generated for each coin, regardless of whether one is needed or not, just to cover the occasional event of someone who is disappointed with the results wanting an explanation. And for experienced collectors "Details - Cleaned" says it all.

It looks like a hit at the "LI" possibly combined with a die chip next to the "I" since there appears to be some extra metal. These cents are known to have some die issues in the area, most often referred to as a "BIE" variety, although without any added value here. Those would just be die chips, whereas a "die cud" is a break in the die which includes the rim ... https://www.error-ref.com/cuds/

I also don't see a striking error, just a worn nickel with hits like near the mintmark and the "A" on the reverse, so maybe you could narrow down your question.

No, that might give it a slight rub mark, but they don't use those. They use PET or "Mylar" double pocket flips (e.g. SAFLIP), and that is what coins are required to be submitted in.

I would speculate that since that was the first year the mint came out with the new golden colored dollar coins that they had to make some initial adjustments to the alloy mix and annealing, and maybe some of the earlier attempts may have just resulted in that brown toning after a short period.

If you post links to these sold coin listings someone can likely assist in explaining the difference.

I think it may have been @Coinbuf who previously mentioned something that can be used to fix or polish coin slabs.

Only a crook would list something worth a few bucks at most for thousands. And people get taken all the time with scam listings, even if not to that extent.

That does look like the HK-331 1905 Bronze L&C Commerative medal ... https://www.pcgs.com/coinfacts/coin/1905-medal-hk-331-bronze-37mm-lewis-clark-centennial-expo/642750 Not "normal", but perhaps a little more common than say on circulating coins of that era due to less stringent controls. But it appears to be the "worthless" type of shelf-like machine doubling ... https://doubleddie.com/144801.html

Not very likely unless there is something specific you are thinking the TPGs might do to give the appearance of being wiped or cleaned.

I'm not aware of any post strike process that may give the appearance of being wiped. What are you thinking of?

You may have inadvertently caused some signs of cleaning by handling and examining the coin a long time ago. Those marks don't just go away.