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When it was introduced in 2007, the OMEGA De Ville Hour Vision heralded a new era for OMEGA. It was the watch that introduced the Co-Axial calibre 8500/8501 whose every part was created in-house using technology which has defined the way mechanical watch movements will be made in the 21st century. The Hour Vision is aptly named: the beauty of the movement is clearly visible through sapphire glass apertures in the side of the watchcase and through the sapphire crystal case back.