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 1910s.

The inside of the band retains it's original "PLAT" stamped, but has also been recently stamped with comtemporary assay marks.
Cut - Oval shaped cabochon
Clarity - Eye clean.
Carat - Approximately 2.50.
Circa - 1910.

Condition - Excellent.
Size - L (UK) or 5.5 (US). Complementary sizing is available, can be sized up or down.
Measurements - The band is 2.6mm at the base, graduating to 10mm at the highest point.
Metal - Platinum. Fully hallmarked.
Gatsby Jewellery Ltd has dated this piece to the 1910s.
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