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.

Cut – Old mine / miner cuts.
Colour – I.
Clarity – SI1; stones are clean to the eye.
Carat – The centre stone is approximately 0.75 carat, with each of the side stones estimated at 0.25 carat each.
Circa – 1935.

Condition – A very small chip to the centre stone. Hardly noticeable, but worth mentioning.
Size – N (UK) or 6.5 (US). Complementary sizing is available, can go up or down.
Measurements – From the edge of one diamond to the other is 14.75. Sits 7.4mm wide and 5.2mm from the finger.
Metal – 18k gold. The diamonds are set in platinum. Tested.
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