CASE: Three-body, solid, polished, curved lugs, snap-on case back, stepped bezel, sapphire crystal. DIAL: White with applied yellow gold baton indexes, outer minutes division, subsidiary dials for the date, the week days, the months, graduation for the age of the moon, aperture for the moon phases. Yellow gold baton hands. MOVEMENT: Cal. 2120/2, rhodium plated, fausses côtes decoration, 36 jewels, straight-line lever escapement, monometallic balance adjusted to heat, cold, isochronism and 5 positions, shock absorber, self-compensating flat balance spring, 21K gold rotor segment. Dial, case and movement signed,in very good condition DIAM: 36 mm THICKNESS: 9 mm