I do love a statement ring, and this one definitely qualifies. 
Over 12g of 18ct gold, a chunky old cut diamond, and finger presence that won't get missed! 
Dating to the 1960s, this piece just oozes cool confidence. 
Stamped and tested as 18ct gold
Weight approx 12.3g 
Diamond approx 0.25ct (calculated in setting) 
Finger size Q / USA 8.5 - fits a little smaller due to width.   
Width at front approx 10mm 
Width at back approx 4mm 
Very good vintage condition - some patina