Attributed to Pierre CONROUX (1923-2003) Lot of four gouache drawings on tracing paper comprising : - a rose gold and platinum band ring centered on a diamond in a closed setting in a stepped surround of calibrated sapphires in a rail setting, brilliant diamonds, the ring with two steps. - a rose gold and platinum ring centered on a close-set diamond in a double surround of diamonds and rail-set calibrated sapphires, the band with gadroons. - a pink gold and platinum ring centered on a diamond in a double setting of diamonds and calibrated sapphires in a rail setting, the band with concave drop motifs. - a pink gold and platinum band ring centered on a diamond in a closed setting in a diamond surround, the shoulder adorned with lines of calibrated sapphires in invisible setting and gold scroll and pearl motifs. Circa 1950. Dimensions: 16.1 x 12.3 cm, 12.4 x 10.6 cm and 10 x 5.5 cm. Annotations, folds, stains.