Art-Deco ring in gold, diamonds and calibrated rubies

An Art-Deco ring in 18k (750°/°°) gold and platinum set in its center with an old-cut oval diamond in a closed setting weighing approximately 0.7 carats K/L SI2/P1 (fit for the naked eye) surrounded a row of calibrated rubies and a row of rose-cut diamonds. Typical French work from the Art-Deco period, circa 1925. Presence of the eagle's head hallmark for the 18 carat gold.

Finger size 57.5, sizing possible
Diamond size: 5.85 x 5.15 x 3.30 mm
Gross weight: 4.35 grams