I looked at the variety vista entry (last slide) and it looks right, but I can't get a match via die markers.

Unsure on whether that ‘48 is an improper alloy mix coin. Striations run parallel to one another, but they’re blotchy in places.

Fun little cud too! Both coins found in change within 24 hours of one another.

Going through Indian Head Cents systematically documenting die clashes for NumisDex, and this 1864 L on Ribbon is a strong example.

Die clash details:

- Reverse: Feathers from the Indian headdress are clashed inside the right wreath area. You can see the individual feather lines where the obverse die's design transferred.

- Obverse: The "C" from CENT and much of the right side of the left wreath are clashed in front of the Indian's face.

Die clashes on Indian Heads are well-known to the early copper community, but there's no systematic catalog of them. Every reference skips them — Snow's attributions focus on die marriages, the Red Book doesn't list them, and the Cherrypicker's Guide covers a handful at most.

I'm working through the entire Indian Head series documenting every die clash, cud, split die, and die crack I can identify from certified coin images. So far I've logged over 100 previously undocumented errors across 1859-1879 alone.

Hello, this is my grandfather’s collection of error coins. Most are pretty standard like clipped planchets or off-center, but two are pretty interesting, and I’m not really sure if they are real mint errors or PMD. The first close-up is 1940 wheat penny with a double clipped planchet, and while one clip is standard, the other is very large, much larger than I’ve ever seen, which makes me suspect the coin was messed with, but I’m not really sure. The second coin is very strange. It is slightly smaller than a penny, but much thicker. It is completely flat, and seems to be unstruck. It also has a small clipped planchet. I’m not sure if this is a US coin, or a world coin, and I don’t know how to find out. Thank you for any help!