Woodbridge Antiques has dated this piece to the 1960s.
An inscription inside reads "copy orig. year 300" referring to the Viking origins of the design.

Ring Size: L
Period: 1960's.
The ring is clearly marked on the inside for David Anderson 925 S Norway Sterling.
A lovely fine quality item in great pre-owned condition.
Measurements: Width at widest point1.1 cm, Width of Band at Base 4mm, Weight: 4.92 grams
Weights and measurements are approximate.
Woodbridge Antiques has dated this piece to the 1960s.
Specialists in quality antique silver, fine jewellery & accessories
You can view the stock and full dealer information on the Woodbridge Antiques Profile Page