This classic set, possibly Art Deco, the engagement ring fitted with a central diamond approx. .40 ct. and two small side stones. The matching band with three small diamonds.
The band and 2 side diamonds together weigh approx. .15 cts.
The diamonds have natural flaws. I am not gemologist but best guess, the large stone is I1-I2 clarity and GHI color. These observations utilizing 10X magnification.
Stamped: RU PALL, Weight: 5.2 gr., Size: 9 3/4
The condition is very good with negligible wear commensurate with age. evidence of resizing.