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 1930s.

Fully hallmarked, London 1938
Cut - Old mine / miner cut
Colour - I
Clarity - VS2.
Carat - 1.03.

Dated - 1938.
Size - Currently Q 1/2 (UK) or 8 1/4 (US). Complementary sizing is available, can go up or down.
Measurements - The diamond is 6.2mm by 6.25mm and sits 7.4mm from the finger
Metal - Platinum. Fully hallmarked.
Video - To view a video of this ring in natural light, please copy/paste the following address into your browser: https://vimeo.com/103719042
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