Crispin Jewellery has dated this piece to the 1950s.
HALLMARKS
Not Hallmarked so tested as

MEASUREMENTS
Old eight cut diamonds; 2mm
Total ring head 11 x 19mm
Ring sits 5mm from the finger
Diamond clarity; Si2-VS2
Diamond colour; J
Weights ; 7.5g
Ring size GB M
STUNNING DESIGN
CONDITION
Good condition, signs of wear commensurate of age.
Stunning genuine period ring
Crispin Jewellery has dated this piece to the 1950s.
You can view the stock and full dealer information on the Crispin Jewellery Profile Page