Gold, agate and diamond desk clock, Cartier, circa 1925

The circular dial applied with translucent pale blue enamel over a guilloché ground, white enamel chapter ring with gold Roman numerals, rose-cut diamond-set hands, the bezel also set with rose-cut diamonds, within a frame of taupe agate decorated at the corners with platinum and rose-cut diamond medallions, strut back, height 2 7/8 inches, case signed Cartier, movement by Cartier.