Baume and Mercier Gentleman's Eighteen-Karat Yellow Gold Automatic Date Chronograph Wristwatch, the heavy round coin edge case with engraved tachymeter bezel with a mechanical automatic calendar movement, the white cream dial with three registers, constant second, thirty minute and twelve hours, the crown set with a blue sapphire diameter, not including the 37.0 mm crown, model #86105, serial #1,691,xxx, and the case, dial and movement signed "Baume and Mercier", l. 9".