Tank Ring in Gold, Platinum, Diamonds, and Rubies

This is an authentic Tank ring from the 1930s, crafted in 18-carat gold and platinum, adorned with diamonds and rubies.
This magnificent ring stands out due to the presence of two diamond cuts: 9 baguette-cut diamonds and 11 round-cut diamonds, totaling approximately 2.5 carats of diamonds. Additionally, it is enhanced by 20 calibrated rubies, totaling approximately 1.5 carats.