Omega Constellation Chronometer Officially Certified, 18kt solid gold case, Calibre 561 , Reference 168005 Movement: mechanical movement, automatic self winding, Calibre 561 Functions: Hours, minutes, seconds, Date Calibre: 561, Automatic, 24 Jewels Case: 18kt yellow gold case, Diameter 34 mm, Thickness 11 mm, plexiglass Dial: Gold dial, applied gold coloured batons with black inserts Strap: Black leather strap will max length 20 cm Total weight: 47.4 grams / 1.670 oz / 30.4 dwt