AgAu Jewellery has dated this piece to the 1950s.

Metal: 18ct yellow gold.
Stone(s): 1 x ruby (0.50ct), 24 x diamonds, totalling (0.50ct)
Ring Measurements: Ring size. 18mm wide x 9mm high
Hallmark: Marked for 18ct gold and 0.50 for diamond weight
Size: UK size L 1/2
Weight: 5.0g
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