Gatsby Jewellery Ltd has dated this piece to the 1920s.
Each diamond is set in a platinum coronet collet and sit on a slim and tapering 18k yellow gold shank. Currently UK size K, US size 5 1/8 (complimentary sizing available).

Accompanied by an independent jewellery report from IGR (#30310637).
Cut – Old mine cuts.
Colour – H to J.
Clarity – SI1 to I1
Carat – The total approximate diamond weight is 1.40 carat.
Circa – 1925.
Size – K (UK) or 5 1/8 (US). Complimentary sizing is available, can be sized up or down.

Measurements – From the edge of one outer diamond to the other is 19.5mm. The ring is 4.8mm at the widest point and sits 4.35mm from the finger.
Weight – 2.82 grams.
Provenance – British.
Metal – 18k yellow gold. The diamonds are set in platinum. Stamped and tested.
Gatsby Jewellery Ltd has dated this piece to the 1920s.
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