More Errors Pics and Questions

Received the last batch of errors coins back from grading and a couple are shown below.....please excuse the color, white balance was off.
Comments and discussion are welcome. I have questions...
The 1918-S cent, I have never heard of that error description. When I look at the coin, it feels like there are silver fragments embedded in the coin. Very odd. Can someone describe this error to me as to what caused it.
The 1969-D 50c Reverse Struck Through. It almost looks the strike through was a quarter. What would account for the reeding marks in the periphery of the smaller indent? Again, not sure what caused this.
The other coins are pretty neat as well. The 25c die adjustment strike is interesting...are they rare?
Thanks and enjoy. keoj
Comments
Post mint damage.
Great errors.
The 1918 is an improper alloy mix, so I'd guess the 5% tin/zinc is showing.
Nah... Looks like Lincoln maybe ate some spicy chili
Nice!
As JBK mentioned most of the early Lincoln's from the teens into the early 20's at the San Fracisco mint had been struck on improper mixed planchets which are called Woody's within this hobby as the look like wood grain.
Very nice selection!
Disclaimer: I'm not a dealer, trader, grader, investor or professional numismatist. I'm just a hobbyist. (To protect me but mostly you! 🤣 )
I also think the Kennedy Half "fragment" was a coin. It's obvious enough that the wording on the slab shouldn't be a problem
I think that NGC got it right(ish). Based on the pics, the struck-through thing was very thin. I see a lot of detail of the expected design, especially around AMERICA. I want to say it was struck through a detached clad layer from a quarter... but a full clad layer would have clearer (and rounder) edges. I'm ok with "fragment" as a description.
Very nice error coins!
That SBA dollar gets 4 stars. Impressive.
Nice coins!
My favorites are the 74 D cent, the SBA & the dime.
Not sure on the half.
If it was struck through a quarter why is the reeding not showing more all the way around?
Now, that's an SBA dollar I would enjoy owning!
Really interesting error coins. Thanks for showing us, and good pictures. Cheers, RickO
Very cool assortment of errors, Joe!!
mbogoman
https://pcgs.com/setregistry/collectors-showcase/classic-issues-colonials-through-1964/zambezi-collection-trade-dollars/7345Asesabi Lutho
Great group of errors.
Love them especially the 74D struck on dime planchet.
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Nice group of errors
Love ‘em!
Great stuff
BHNC #203
Great group of errors. Especially love that half rev. struck thru.
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Wildly cool. I like them.
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