set in platinum with 22 diamonds weighing 1.6 carats c.1930s
it graduates to the front 3 Diamonds which are larger than the other 19 Diamonds hence the ring band is at its thickest at this point.
An eternity ring, also known as an infinity ring, is a woman's ring comprising a band of precious metal (usually gold) set with a continuous line of gemstones (usually diamonds) to symbolize neverending love, usually given by a spouse to their wife on the occasion of a significant anniversary, typically after 10 or more years of marriage.
Product REF: 734P