A pair of half-hoop rings by Van Cleef & Arpels
A pair of half-hoop rings by Van Cleef & Arpels, one set with a baguette-shaped ruby, the other with baguette-shaped sapphire and both with twenty-four graduated round brilliant-cut shoulder diamonds in yellow gold, signed VCA and numbered C5307G1, the other C5307F1 French control marks, both size L, fitted case by Ogden