Most of the spots I hunt are early 1900's to 1970's. I can generally date a ring by the coins dug. Also a little research on the history of the beach/area might add to the date of. Looks vintage, but no earlier then the 1900's. I would clean it and check for worn/faint Sterlings or 925 marks, either of those would give you a better idea of the date. Good Luck.