Attributed to Pierre CONROUX (1923-2003) A gouache drawing on tracing paper depicting a platinum or white gold ladies' wristwatch, the round case with bezel encircled by brilliant-cut diamonds, the three-strand lugs, then the bracelet with a row of rail-set calibrated-cut diamonds and brilliant-cut diamonds. Circa 1950-60. Size: 25 x 16.3 cm. Annotations on the carat weights of the different types of diamonds at bottom left, stains, small fold.