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: Hello,
: I've been browsing and have seen some talk
: about early problems with the Coaxial
: movement, leading to I believe, 3 versions,
: a 2500a,b,c.
: Is this correct ?
Yes, but caliber 2500A was problematic from day one and was quickly replaced with caliber 2500B. 2500B works fine and wasn't replaced until late 2004/early 2005 with caliber 2500C, which is now in the Planet Oceans, Aqua Terras, and base DeVilles. 2500C has a slower beat rate to give it more power reserve. Some modifications were also made to make production of the movement easier. Otherwise, both the B and C versions have been reliable.
: I'd like to make sure that if I buy a Deville
: Chronometer or Cronograph, I get the latest
: movement with all the fixes. Is there some
: way to know this information ?
The picture below shows the 2500B stamp in the lower left hand corner. If you were buying an Aqua Terra, you could simply look through the sapphire caseback. If you were buying a Planet Ocean, you could be certain that it has caliber 2500C since ALL Planet Oceans use this movement. In the case of the DeVille, this model is not nearly as big a seller as the Aqua Terras and Planet Oceans, so I suspect there are quite a few "old stock" pieces sitting around with caliber 2500B in them. Unfortunately, the only way to be 100% certain is to open up the caseback.
Good Luck,
John
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