Crispin Jewellery has dated this piece to the Victorian era.
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HALLMARKS
Not Hallmarked but tests as

MEASUREMENTS
Old cut diamonds; 3.5x3 - 5 x 5.5mm. These diamonds are absolutely superb
The diamond are very clean indeed, approx H-J and clarity VS2-Si2
The diamond content weighs 0.75, 0.25, 0.25, 0.15, 0.15ct as a minimum as the depth is not taken into account and these are very deep. Further diamond chips are set within the claw areas- a sign of absolute finest quality to hide 'metal claws'.

Total diamond content 1.55ct
Ring head diameter; 18 x 6mm
This is such a stunning design, a rare find, beautifully intricate
WEIGHT
3g
CONDITION
Good condition, minimal signs commensurate of age. This is a stunning ring with very beautiful deep cut diamonds
RING SIZE
GB N1/2 US 7
Crispin Jewellery has dated this piece to the Victorian era.
You can view the stock and full dealer information on the Crispin Jewellery Profile Page