Trilogy platinum ring set with 3 old-cut diamonds

Platinum trilogy ring adorned with 3 half-cut diamonds, claw set, dating from the 1930s.

Material: Platinum
Hallmark: Mascaron
Weight: 3.1g
Length: 1.4 cm
Width: 0.5 cm
Resizable finger size: 52
Carat weight: 1.10 cts; 2 diamonds of 0.30 ct and 1 diamond of 0.50 ct.
Number of stones: 3
Period: 1970