Crispin Jewellery has dated this piece to the 1920s.
The central diamond spreads 1.50ct, measuring just under 8mm. This has not been out and weight but diamond weight approximately 1.3-1.40ct.

There are further old cut diamonds to the shoulders, ever 4 diamond at each claw head to the central diamond- a mark of superior quality.
The ring is a large size currently and GB U, this can however be resized to make smaller if required
Crispin Jewellery has dated this piece to the 1920s.
You can view the stock and full dealer information on the Crispin Jewellery Profile Page