AgAu Jewellery has dated this piece to the 1960s.
75 to the shank to denote to diamond carat weight. The ring is a UK size O and weigh 4.4 grams. The ring is in excellent condition.

Metal: 18ct yellow gold
Stone(s): 9 clean sparkly diamonds
Stone Weight: 0.75ct total diamond weight (.75 also stamped to shank)
Hallmarks: Full UK hallmarks for 18ct Gold
Ring size: UK size O,
Weight: 4.4g.
Condition: Very good condition
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