Gatsby Jewellery Ltd has dated this piece to the 1930s.
The diamond is secured in an eight-claw coronet collet, leading to slim and tapering shoulders which are set with eight (four each side) eight-cut diamonds, leading to a slim, platinum shank.

Accompanied by a Natural Diamond Grading Report from HRD Antwerp (#210000182419).
Cut – Old oval cut (eight-cuts in the shoulders).
Colour – I (F to G in the shoulders).
Clarity – SI1 (VS1 to VS2 in the shoulders).

Carat – 0.84 (with a further approximate 0.06 carat in the shoulders).
Circa – 1935.
Measurements – The diamond is 6.73 x 5.05mm. Sits 6.1mm from the finger.
Size – M (UK) or 6 (US). Complimentary sizing is available, can go up or down.
Metal – Platinum. Tested.
Video – To view a video of this ring recorded in daylight, please copy / paste the following link into your browser: https://vimeo.com/856455356
Gatsby Jewellery Ltd has dated this piece to the 1930s.
Gatsby jewellery are a husband and wife team who have years of knowledge and experience in dealing in fine antique jewellery.
You can view the stock and full dealer information on the Gatsby Jewellery Ltd Profile Page