I can't figure out who manufactured this piece

Bottom says made in U.S.A
Markings "656"
Looks like a small eagle with spread wings on bottom
Thanks for any help.

https://www.box.com/s/38qo9jh4ue1k36wo8e8f

https://www.box.com/s/ifuz6n4sk0elcxig7c3a

https://www.box.com/s/ifuz6n4sk0elcxig7c3a

It is a beautiful piece, but I can't help you identify the potter. There are many people who produce good pottery and put it up for sale. If it had British markings I could probably help, but not in this case. Sorry.