Fine and rare, 18K yellow gold wristwatch with square button chronograph, register and tachometer.Three-body, polished, triangular lugs, snap-on case back. Satine silver with applied yellow gold and black baton indexes, outer 1/5th second track and tachometer graduation to 700 UPH, subsidiary sunk guilloche dials for the seconds and the 30-minute register. Yellow gold and black baton hands. Cal. 320, copper color, 17 jewels, straight-line lever escapement, monometallic balance, shock absorber, self-compensating Breguet balance spring.
Dial, case and movement signed. DIAM. 35 mm. THICKNESS 11 mm.