If i had found it i would throw it in the 1800s Prussian coin jar.
The crown looks a bit weird and with no 2 visible (for me) on the coin you can check it out yourself with the coin in hand. Prussian 2 Pfenning have a very characteristic 2. Preußen 2 Pfennige 1851 Preußen - Münzen - Catawiki
Not quite, the '2' is similar but it has a boarder around it, hard to see but like a wreath. I don't think it has an eagle in the shield, maybe a simple cross.
possibly greek 2 lepta.....Joe McDonough