CARTIER BLACK ONYX & SAPPHIRE DESK CLOCK
Cartier, Paris, No. 102889. Made circa 1919.
Fine and rare, square black onyx, gold, sapphire and
gilt-brass, 8-day going strut desk clock.
Square, black onyx with inset corners and beveled edges,
a cabochon sapphire set in gold at each corner, polished
yellow gold bezel decorated with two concentric champlevé
white enamel lines, gilt-brass clock case with hinged strut.
Matte silver with radial Roman numerals, outer minute
track, sunray engine-turned center. Blued steel spade hands.
19''', matte gilt, 15 jewels, straight line lever escapement,
cut bimetallic compensation balance, blued steel Breguet
balance spring, index regulator.