Seeking Any Chatfield Info..Have Coat Of Arms

I am living in New Hampshire and very interested in tracing back the Chatfields I am of. My Grandfather was William Oscar Chatfield of Braintree, MA and his father was Oscar Chatfield...unfortunately as Oscar died when William Oscar was 3, the trail ends there...I have in my posession an item which was passed to me by family, it is a Coat Of Arms with the family motto of "Che Sara Sara" and three Cockle shells (Crusading family members..!?) and a Goat-dragon with a crown around it's neck. It is impossibly old, and pressed into the back in a relief are the words " Arms Grafted 1562 by Queen Elizabeth."
This came down presumably through the family. I believe the Beverly on this site may be my aunt who now resides in Illinois...yes? Anyway, I am not financially equipped for a full geneaology but would love to find out anything I can. I know the info is sparse..anything would help. Please contact by email at [email protected]
Thanks!