AgAu Jewellery has dated this piece to the 1960s.

Metal: 9ct yellow gold.
Stone(s): 1 x London Blue Topaz (0.50ct), 2 x Swiss Blue Topaz (0.25ct), 2 x Sky Blue Topaz (0.10ct)
Ring Measurements: Ring Face. 2.0cm x 0.5cm
Hallmark: Hallmarked for 9ct gold
Weight 2.1g
Size: UK size O
AgAu Jewellery has dated this piece to the 1960s.
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