✅ SOLVED Here is another one to ponder

[creskol]

Pewter ..I think .. integral cast shank...5/8" in diameter... depicts something, but who knows what?

 

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[tamrock]

There's something on it.

 

[ANTIQUARIAN]

Definitely an oldie, probably 18thc.
I tried to 'clean up' the face, unfortunately I can't see a design on the front.

Dave

 

[Gambrinus]

Maybe it used to be a wax seal stamp. https://www.google.com/search?q=ant...kp4KwBw&bih=632&biw=1360&client=firefox-b-1-d

 

[A2coins]

I would clean it more better to try to know what it is than to not know if it can be cleaned more

 

[GoldieLocks]

Try to do a rubbing on paper.

 

[creskol]

This is the best I can do with it. You can make out things a little better under a loupe. Something there, but to dfar gone to tell what it was.

 

[Anduril]

On your first pic.... I see "Super" with a little R in a circle (like the symbol for a registered trademark).

Of course, it could also say "Eat at Joe's".
This baby is toasted.