Colonial Cut Silver or Copper Coin: ID Request! (Size of a Half Dollar)

[mparis]

Hello Treasurenet,

This past weekend I was metal detecting a colonial site on Long Island where a lot of large cents, flat buttons, reales, etc... have been pulled previously. I got a solid 77 signal on the VX3 at about 5 inches deep, a little low for silver (same depth everything else was). Out popped this.



It is not Spanish and I could barely make any details out. After multiple rounds of electrolysis I believe I see a bird and what looks to be "EG"

Curious if anyone knows what this coin could be. The site yielded many pewter tombacs and the oldest coin to date was a KGII 1745. Youngest Large cent was an 1830 matron.

Any help is greatly appreciated!!

 

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[BuckleBoy]

Goodness, the diameter of this coin would CERTAINLY help us as we try to ID it for you! (measure across the long side)

This is the only coin I can think of with the same style of lettering (see "REGINA" on the reverse). Is your coin either 38mm or 31mm?

 

[mparis]

Hey Buckleboy sorry for not providing the exact measurement. Yes 38mm diameter! Silver test confirmed it is silver.
Thank you for the response!