Sandon

The outer layer of clad coins is composed of the same 75% copper, 25% nickel alloy of which "nickels" are composed of homogeneously. This alloy darkens to a deep red or even black color when the coin has been buried or exposed to other corrosive environments. Such environmental damage is what has occurred to this 2015-D Homestead quarter. There are clad coins that are missing part or all of a cladding layer, usually on one side of the coin. There are even lamination errors within the outer clad layer, which doesn't expose the copper core. See https://www.error-ref.com/?s=missing+clad+layer. This coin isn't one of them.

We have an old but still valid expression, "buy the book before the coin." Knowledge is vital for more enjoyment of collecting and avoiding costly mistakes. For collecting Canadian coins, the Charlton catalogs and guides are, I understand, considered basic references. See https://www.charltonpress.com/collections/current-editions/products/canadian-coins-vol-1-numismatic-issues-2024-2025-77th-edition and related pages on that site. For U.S. coins this would be the "Red Book" and other resources described in the following topic:

The apparent lack of doubling on any design elements other than the ear suggests to me that these coins were not struck from a doubled die and that the anomaly is due to some form of die damage, as is now believed to be the case with the similar appearing so-called 1997 DDO, FS-101. See Lincoln Cents, Memorial Reverse (1959-2008) | VarietyPlus® | NGC (ngccoin.com). Obviously, this 2024 variety is worthy of further investigation.

Welcome to the NGC chat board. Please note that the Coin Marketplace forum is for offers to buy or sell coins in accordance with the posted guidelines, not for questions about coins or their values. Such topics are welcome on the "Newbie Coin Collecting Questions" forum. You should post clear, cropped photos of each side of a coin, not distant, blurry photos like these that are mostly of the surface surrounding the coin. Based on the photos, these are circulated Sacagawea and Native American dollars that have no collector value and are worth their face value of $1 each. You may keep them if you find them interesting or spend them.

Welcome to the NGC chat board. Please post clear, cropped photos of each full side of a coin about which you have questions. Based on the current photos, your coin appears to have defective plating, not any form of doubling. The following links may be helpful to learn how to distinguish coins struck from doubled dies from those exhibiting other forms of doubling, which have no collector value: Double Dies vs. Machine Doubling | NGC (ngccoin.com), https://www.doubleddie.com/144801.html.

The so-called and misnamed 1964 "SMS" coins don't have mirror surfaces like your coin, which is obviously a proof strike, one of 3,950,762 issued in proof sets. It is now believed that what are now described as 1964 "Special Strike" coins "consisted of ordinary coinage of the type made for circulation, but the dies were fresh and sharp, retaining the satiny fields characteristic of new dies, along with the fine, irregular polishing lines also typical of new currency dies." 1964 50C SP | Coin Explorer | NGC (ngccoin.com) (Emphasis added). Without this satin finish and die polish, like that shown on the image of the coin in the NGC Coin Explorer, any "die markers", assuming your coin has them, are meaningless. It appears that all of the known 1964 "Special Strike" originated from a specific source from which they were distributed in the early 1990s, and none has been found elsewhere. A number of claims of having found examples, which usually turn out to be ordinary circulation strikes, have been made on these forums, and none has been validated to date. Ongoing research may reveal that even the authenticated pieces really shouldn't be regarded as "special" either. See Comprehensive Research on the So Called 1964 "SMS" Coins Is In the Works - What Questions Do Members Here Have About these Coins? - US, World, and Ancient Coins - NGC Coin Collectors Chat Boards.

Welcome to the NGC chat board. First of all, please note that a coin struck from a doubled die would be classified as a die variety, not as a mint error. The variety would pertain to most or all coins struck from that die, while a mint error is generally produced by a problem in producing a particular coin. Based on your photos, which are somewhat blurry, there are faint, shelf-like extra images that are not indicative of a doubled die. This is likely strike doubling (a.k.a. machine or mechanical doubling), which results from the die being loose in the press and is very common. See Double Dies vs. Machine Doubling | NGC (ngccoin.com). Such coins do not command a premium and should not be submitted to third-party grading services, which will not attribute them. For more about strike doubling and other forms of doubling on coins that do not have collector value, see https://www.doubleddie.com/144801.html and links therein on mechanical doubling, die deterioration doubling, and abrasion doubling. Since 1996, when the mint changed its method of manufacturing dies to a "single squeeze", there are far fewer significant doubled die varieties. There are some minor ones that can be found on the doubleddie.com and varietyvista.com websites.

This appears to be a normal 1960-D large date cent, not the small date over large date variety. Please post full, cropped photos of both sides of a coin about which you have questions.

The coin is genuine but has been counterstamped by one or more metal punches with a political slogan after it entered circulation.

1875 Indian cent, PCGS graded MS 63 RB: Photos courtesy of Stacks Bowers Galleries.

This coin has been acid etched, which brought back some of the details, such as the bison's horn, which had probably worn away, but which is regarded as a severe impairment and wouldn't be saleable to serious collectors. You should buy coins in the best condition that you can afford.

1885 Liberty nickel, now NGC graded XF 45:

Although I would prefer better photos (both sides, better lit, focused and cropped, and from directly overhead), I think that it is likely that this 1900 half eagle is counterfeit. I see raised lumps of metal on Liberty's face and in the fields, and the details seem somewhat soft. The mint was careful about keeping gold coins within legal tolerance when the country was on the gold standard, and I doubt that a gold coin with as little wear as this would be a third of a gram underweight.

Welcome to the NGC chat board. The 1976-D Bicentennial quarter had a mintage of over 860 million pieces, and many were saved as novelties. They have no collector value in any circulated grade. The one you found has only light wear, and you can, of course, save it if it interests you.

You could be using a browser, such as Google Chrome, that doesn't work well with the NGC website. If you're using Chrome, try using Microsoft Edge. I've never been able to figure out why Chrome doesn't support many features on the NGC website, including certificate verification and the price guide, but it just doesn't, no matter what "cookie" or other settings I use.

Welcome to the NGC chat board. These are just common date U.S. one cent coins that currently circulate. Each one has a mintage in the billions, and they only have collector value in nearly perfect, uncirculated grades, which these aren't. Was there anything else you wanted to know about them?

1893-CC Morgan dollar, now NGC graded VF 30:

You are apparently looking at the score shown on the NGC Coin Explorer, but on the set I linked, a VF example is listed at 1531 points under the "Eligible Coins" listing. If you think that the score you received should be increased, you may request a score correction as shown in the following topic on the Registry forum: You may be able to find answers to other questions on the Registry forum, including in the section entitled "NGC Registry Help and Instructions". You may also want to post questions about the Registry on the forum for answers from the Administrator, who monitors it.

In what set in the Registry (not "register") are you looking?

1884 Morgan dollar, NGC graded MS 64:

I assume that your question is, "Does a VF 25 1937-D 3-legged Buffalo nickel receive 6 points in the NGC Registry?" The answer is "yes, in a type set." Type sets are scored solely on the type of the coin, its grade, and whether it was made in circulation strike or proof format. Any circulation issue 1913-38 "Variety 2" Buffalo nickel graded Very Fine would receive 6 points in a type set. I assume that you used the coin to fill a slot in a type set. In a date and mint set, such as Buffalo Nickels 1913-1938, Complete Circulation Issue Sets | NGC Registry | NGC (ngccoin.com), where the rarity of the specific issue counts, the 1937-D 3-legged Buffalo is worth 1531 points in Very Fine grade.

No, coins with filled mintmarks are not worth a premium due to that characteristic. Collectors generally prefer coins with clear mintmarks. The only 1979-P SBA dollar variety worth a premium is the "Wide Rim", which this coin isn't. See Anthony Dollars (1979-1999) | VarietyPlus® | NGC (ngccoin.com). Your 1979-P SBA dollar is circulated, appears to have been struck from worn dies, and has heavy marks on Anthony's face. It is only worth face value in this condition.

If you click the three horizontal dots on your initial post and select "Edit", you should be able to change the topic title.

You should change the topic title for it to receive proper attention and be of value to future readers. It can be difficult to distinguish the so-called "large" and "small" date 1970-S varieties. Based on the photos, which are somewhat unfocused, I think that both of these coins are "large dates", as are the vast majority of 1970-S cents, especially those taken from circulation. The "9" and "0" appear to be higher than the "7" on both coins. The tip of the inner curve of the "9" appears blunt as well. (I'd like to thank @Coinbuf from pointing out the latter feature, of which I wasn't previously aware.) The best way to distinguish the two varieties may be by looking at the obverse lettering instead of the date. Here are photos of the obverses of (1) a 1970-S "small date" cent in a 1970 "mint set" that I "cherrypicked" some years ago and (2) a 1970-S "large date" cent. Note how the lettering on the "small date" hub was much lighter than that on the "large date" hub. The lettering appears somewhat different on circulated coins, but I think that both of your coins have the bolder, "large date" lettering style.

1888 Liberty Seated dime in a green label PCGS holder giving a grade of "AU 53", while the PCGS database says, "PR 53". The coin has proof characteristics notwithstanding the weakness on Liberty's head, and the die variety exists in both proof (F-101) and circulation strike (F-101a) format. I bought it out of a dealer's "cheap slab" box for all of $45 in 1994.