Just Bob

Welcome to the forum.
Le Vieux Moulin a Nestou means "The Old Mill in Nestou." It was or is a restaurant. Here is a picture of the restaurant from a postcard, with a link to the website where the post card was found: 
https://collection-jfm.fr/p/cpsm-france-06-cros-de-cagnes-le-vieux-moulin-de-nestou-58127
 

In the past,I have posted pictures of a bill-style wooden nickel from the 1941 Clarksdale, MS DeSoto celebration that I purchased several years ago. Tonight, I was looking at exonumia on the 'bay, and found an auction for some more of those, but different denominations. With just over 11 minutes left in the auction, I quickly put it a bid, then sat and watched until it ended. I won.
Seller's pics:
 

In the past,I have posted pictures of a bill-style wooden nickel from the 1941 Clarksdale, MS DeSoto celebration that I purchased several years ago. Tonight, I was looking at exonumia on the 'bay, and found an auction for some more of those, but different denominations. With just over 11 minutes left in the auction, I quickly put it a bid, then sat and watched until it ended. I won.
Seller's pics:
 

Too bad. That was some good cookware at one time.
I would love to see the slab that this piece would fit.

I don't think it is a stretch at all. In fact (not to steal your thunder, but) I have had the same idea. Coffee, Coke, or some other acidic drink spilled into the cup holder, coins stacked on top of each other, soaking in the liquid... who knows what form the damage on a coin's surface will take - including the shape of any letters or numbers on the coins that are touching it.
 
 

I don't think it is a stretch at all. In fact (not to steal your thunder, but) I have had the same idea. Coffee, Coke, or some other acidic drink spilled into the cup holder, coins stacked on top of each other, soaking in the liquid... who knows what form the damage on a coin's surface will take - including the shape of any letters or numbers on the coins that are touching it.
 
 

It doesn't match any of the other styles or sizes of "S" on the coin, so it can't be a dropped letter error. Just damage that happens to look like a letter "S," I am afraid.

I would just add that if you plan to stick with the hobby, I would strongly recommend buying a copy of A Guide Book of United States Coins (also called the Redbook).  You'll be able to figure out which coins are common vs rare.  You'll also get mintages, mint mark locations, a basic grading guide, weights, compositions, dimensions, and some history.  All at your fingertips without having to sort through all kinds of web sites.
I would bet that nearly every experienced collector on this board who started by collecting US coins had one and used it frequently.  It's the best $15 you'll ever spend on the hobby

I plug my phone directly into my laptop to transfer pictures. It seems to work well.
And here is a link to the Numista page on your coin, in case you haven't checked it out over there. (Sorry, no picture of a proof.)
https://en.numista.com/catalogue/pieces2725.html

No need for anyone else to elaborate. You answered it well enough.

No need for anyone else to elaborate. You answered it well enough.

Cracked out of an ANACS details holder years ago, and carried for several years as a pocket piece.
 

Congratulations on scoring the elusive '21-S in such nice condition! And a big "WELL DONE" on completing your set! 

I was going to write something along these lines, but you did a much better job than I would have, and went into much more detail. So, I will just say, "Yeah - what he said."  

This is the first time I've ever seen any of these. Love the rainbow toning on the German side.
Leave it to you to come up with something this unusual. 

Welcome to the forum. 
Let's narrow this down:
The 1818 cent was the "Matron Head" design. Since this is a Braided Hair cent, it had to have been made between 1839-1857. (It is most definitely not one of the rare proof re-strikes from 1868) Further, the obverse was modified in 1843 by changing and repositioning Miss Liberty's head slightly. You don't show the reverse, but it was also modified that year. All that being said, the most likely explanation is that it is a cent from 1848, which was damaged, either intentionally or accidently, which made the "4" look like a "1".
 
While I was typing, the reverse picture was posted. It is the later, "Large Letters" version, used after 1842. "A modified 1848" seems to be the answer.

Congratulations on scoring the elusive '21-S in such nice condition! And a big "WELL DONE" on completing your set! 

You do realize that our esteemed hosts also have a Variety Plus section that gives information about coins like this, right? 
(Picture below courtesy of NGC)
 
Here is a link to the Roosevelt dime varieties:
https://www.ngccoin.com/variety-plus/united-states/dimes/roosevelt-dimes-1946-date/
 
 

Picked this one up a few days ago. Just liked that it was a knockoff of a 8R C&R.

Yep

S-224 looks right, and I like this one as a VF. Not all beat up or corroded like many large cents, I really like the color, and, the granularity doesn't bother me a bit. Nice coin!

C'est Francaise 

C'est Francaise