AgAu Jewellery has dated this piece to the 1950s.

Metal: 14ct yellow gold.
Stone(s): 1 x opal doublet approx (1.50ct)
Ring Measurements: Ring size. 11mm wide x 12mm high
Hallmark: Marked for 14ct gold & fully tests for 14ct gold
Size: UK size N
Weight: 2.2g
Condition: Excellent
AgAu Jewellery has dated this piece to the 1950s.
Agau jewellery offer an extensive range of 9ct and 18ct gold jewellery.
You can view the stock and full dealer information on the AgAu Jewellery Profile Page