Ring with sapphire of approx. 7ct (no signs of heat treatment)

Ring with sapphire (no signs of heat treatment) from approx 7 ct surrounded from 10 brilliant-cut diamonds from approx 0.50 ct with good color and clarity. 18K WG, 11.6 gr, ring size 58, around 1970, signs of wear, ring width chance visible, sapphire slightly scratched, DSEF 036792 from 12/23 enclosed.