Tin (maybe) screw type cap with embossed eagle??

[Derringer]

Looking for help identifying this...can't find anything close. It's about as round as a quarter.

 

[capsmith]

Could it be a top off of a new round beer can.

 

[Derringer]

No, too old and too small

 

[Shiloh]

Possibly an old wine bottle from the 50's

 

[SkaBa]

Don't know if this helps or not, but I just started checking some bottles and a 5oz condiment bottle fit your dimensions of being quarter sized. A quarter was slightly smaller than the bottle cap top (plastic).