Franck Muller. An 18 carat white gold and diamond-set automatic wristwatch, ref:2852 SC D, Case No.53, Circa 1990 21-jewel Cal.2800 movement adjusted to temperature and 6 positions, monometallic balance, platinum winding rotor, engine turned silvered dial, eccentric Arabic hour numerals, blued steel hands, sweep centre seconds, brushed and polished case, screwed engraved case back, diamond-set bezel, fitted leather strap with 18 carat white gold and diamond set Franck Muller buckle, case, dial and movement signed, diamonds approximately 2.72 carats total, 31 mm