Mad Men era 1967 Australian Sapphire & Diamond ring, 18k with 7 old cut diamonds

Mad Men era 1967 Australian Sapphire & Diamond ring, or engagement ring, 18k with 7 old cut diamonds This 13 stone Sapphire and Diamond ring was made in London in 1967 (hallmarked) and features an Emerald Cut Dark Blue Australian Sapphire measuring 7.92 x 5.98 x 4.43mm weighing in at 2.10cts. The Sapphire is surrounded by 12 single cut Diamonds white gold grain set on a pointed swept up shoulder on top of a 1/2 round 1.83mm band. There are 12 Diamonds measuring 1.3mm all well matched at H VS to SI. The ring weighs a total of 4.24 grams and re-sizing is included with all rings.