Romano-Egyptian Gold Ring with Snake and Mouse

1st century BC-2nd century AD. A gold finger comprising a tightly twisted hoop developing to a snake's head with jaws gaping and forked tongue extended entrapping a mouse resting on the snake's tail. 4.33 grams, 22.51mm overall, 18.33x16.26mm internal diameter (approximate size British M 1/2, USA 6 1/4, Europe 13.09, Japan 12) (3/4"). Property of a Richmond gentleman; part of his family collection formed before 1980; thence by descent.
Condition Report: Very fine condition.