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http://www.vopt.com/vopt9too.htm

You could argue that the release of Philippe Dufour's Grande et Petite Sonnerie in 1992 is one of the most important achievements in the modern era of watchmaking. At link all two years old, I wasn't buying watches then, so if you disagree with me, give me a little leeway to make that claim. In 1992, Dufour was making something few people could dream link of doing. Then he finished link the watch to a level that hadn't been done before and has set the standard for everyone since.

The 42mm rose-gold iteration features a link contrasting dark blue skeletal framework link which is also used in link a new white-gold version with 56 brilliant-cut diamonds totaling 1.59 carats framing the open-worked movement.