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 1950s.

Cut – Old European cut
Colour – F.
Clarity – VS1.
Carat – Approximately 0.50.
Size – N (UK) or 6.5 (US). Complementary sizing is available, can go up or down.
Measurements – The diamond is 5.1mm in diameter and sits 6.2mm from the finger.
Metal – 14k white gold. The diamond is in platinum. Netherlands oak leaf hallmark.
Gatsby Jewellery Ltd has dated this piece to the 1950s.
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