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 a sapphire report from Gemmological Certification Services (GCS) stating the sapphire shows no indication of heating, and originates from Madagascar.
Cut – Cushion cut sapphire with round brilliant cut diamonds.

Colour – The diamonds are G to H.
Clarity – The sapphire is SI. The diamonds are SI1.
Carat – The centre sapphire is a known 1.77 carat. Each diamond is approximately 0.04 carat.
Circa – 1945.
Size – M 1/2 (UK) or 6.25 (US). Complimentary sizing is available, can go up or down.
Measurements – The sapphire is 8.99 x 5.72mm and sits 4.9mm from the finger.
Metal – The band is stamped 18CT. The sapphire and diamonds are set in platinum (tested).
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