It was listed by Crispin Jewellery. Sold pieces stay on Sellingantiques as a record of what has passed through, and the next one is rarely far away.
Crispin Jewellery has dated this piece to the 1920s.
This piece is most likely made in France
HALLMARKS
Not Hallmarked so tests as

MEASUREMENTS
Central Old cut diamond; 2.5mm.
Old rose cut diamonds; 1-1.5mm
Calibre cut sapphires; 1.5mm
Ring head; 20 x 10mm
WEIGHT
2.8g
CONDITION
Good condition, wear commensurate of age. A beautiful and sought after traditional design. Not a reproduction.
RING SIZE
GB O 1/2 US 7/12
Crispin Jewellery has dated this piece to the 1920s.
You can view the stock and full dealer information on the Crispin Jewellery Profile Page