For 2011 one of Audemars Piguet's exotic complication pieces will be this Millenary Minute Repeater watch. I was told by Audemars Piguet that their Millenary line is undergoing an overhaul. Looks like 2011 will not be the year we see new Millenary cases and style, but we will see this sophisticated Minute Repeater with another interesting balance wheel and escapement device.
The terminology throws me off a bit. There are terms like "AP Exhaust Pulse Direct." Not sure what that is, but it sounds like something from a race car, not timepiece. Previous to this new movement, Audemars Piguet showed off its AP Escapement. That escapement was really fast, to allow for greater accuracy. The AP Escapement was one that they developed to run at something like 72,000 bpm (amazing). Here in the Millenary Minute Repeater, the movement has slower 21,600 bpm movement, but AP uses one of those trendy new "double balance spring." These are pretty neat and are supposed to help cancel out error making the movement more accurate. Basically the balance spring attaches at two points (versus the older Breguet over-coil style attachment). If I had larger images I would show you a closeup of the escapement so that you could see what I am talking about.
Double balance springs (also called "double flat spiral here) work pretty well I hear, but I don't have a quantifiable number as to how much better they are. It is part of a brand new movement which is the Caliber 2910. It mixed that exotic new double balance spring with a minute repeater. Cause you know, having a minute repeater is never not appreciate. AP does however make it clear that the watch is NOT water resistant. Most good minute repeaters aren't - because sealing a case makes minute repeaters often sound like crap. The watch has a power reserve of 165 hours, which is really long. That is between two barrles. A third barrel is in there for the minute repeater's power needs. The movement is also neat because it is oval in shape - which I find cool.
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