Vintage Small Ring Silver Tone with Black Stone (Onyx?) & Flowers, Signed DS

Description

This is a smaller ring which is nice as a pinky or young person's ring.  I've been told the size is 4 1/4.  I wore it as a pinky ring as an adult.  It has beautifully detailed flowers on the sides and what is probably a marquise cut onyx in the center.
The back is marked with a copyright symbol, what looks like 85, and DS.