Help Identify: Coin?

[JeffDowns]

On the right is a trime, on the left is, I don't know what. I am convinced (although my mind could be changed) it is not a button. Depends on which way I turn the coin, I see many things; things that it certainly is not. Any thoughts?

 

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[Toecutter]

Take measurements might be able to ID it that way...

 

[Mackaydon]

Known coin measures 9.5 MM on the screen whereas the unknown object measures just over 10MM.
Actual Trime measures 14MM. Based on that proportion, the unknown object has a diameter of nearly 15 mm.
Don.......

 

[cudamark]

Can't see any features in your photos. Maybe some better closeup of the item. You might also try to take a pencil rubbing off it. That might bring out some details.