It was listed by Gatsby Jewellery Ltd. Sold pieces stay on Sellingantiques as a record of what has passed through, and the next one is rarely far away.
Gatsby Jewellery Ltd has dated this piece to the 1940s.

Accompanied by an independent jewellery report.
Cut –Cushion shaped old mine cut in the centre with round old cut diamonds either side.
Colour – I in the centre; G and M either side.
Clarity – SI1.
Carat – Approximately 0.80 carat in the centre, with an overall weight of approximately 1.48 carat.

Circa – 1945.
Size – N (UK) or 6.5 (US). Complimentary sizing is available, can be sized up or down.
Measurements – From the edge of the outer most diamond to the other is 15.9mm. The ring is 6.2mm at the widest point and sits 5mm from the finger.
Metal – Platinum. Tested.
Video - To view a video of this ring in natural light, please copy / paste the following link into your browser: https://vimeo.com/273724313
Gatsby Jewellery Ltd has dated this piece to the 1940s.
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