Vintage Hans Hansen Sterling Silver Heavy O Ring 1970s

A solid silver O ring of a heavy oversize signet style with a round flat table with an oval aperture creating a heavy O motif - marked for Sterling silver and with the HaH mark for Karl Gustav Hansen for Hans Hansen of Kolding - total weight 18.2grms - diameter of face 25mm - current ring size approx M AU/UK (US 6) - c.1970 Denmark