OMEGA SEAMASTER 'MONTREAL' CHRONO-QUARTZ 32KHz. REF. ST 396.0839. PRODUCED IN 1977 World's first wristwatch with digital/analog chronograph, invented by Omega and launched at the 1976 Montreal Olympic Games. Case: rectangular with rounded corners in stainless steel, 3 pushers at 9 o'clock, solid back stamped with the seahorse, in reference to the Omega Seamaster, and the Olympic crest. Dial: analog display for the hourly functions and digital display for the chronograph (operating independently but on the same 32KHz quartz resonator). Movement: electronic quartz, cal. 1611 "Albatros". N°10'104'445. Strap: stainless steel bracelet, folding clasp ref. 1277/212, signed. Dial, case and movement signed. Diameter: 47mm With: Omega certificate of authenticity and purchase invoice Somlo Antiques, London.