The amazing sapphire case of this Omega Hour Vision proudly shows off the in-house Co-Axial 8601 from almost every angle! Combining two of watch-makings most celebrated inventions, the Annual Calendar and Co-Axial escapement, this complicated De Ville automatically corrects the date for long and short months, only needing correction once a year in February! With its Omega box and covered by our 2 year warranty.