Gatsby Jewellery Ltd has dated this piece to the 1950s.

Cut: Old European.
Colour: I to J.
Clarity: SI1.
Carat: Each diamond is approximately 0.25 carat.
Circa: 1950.
Size: O 1/2 (UK) or 7 1/4 (US). Free sizing available.
Measurements: Each diamond is approximately 4.2mm in diameter. The ring is 8.8mm at the widest point and sits 5.3mm from the finger.

Weight: 2.20 grams.
Metal: 14k white gold. Tested with a Niton DXL Precious Metal Analyzer.
co.uk/products/vintage-0-50-carat-old-cut-diamond-bypass-ring-circa-1950
Item # 27214S449
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