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Calibers 3301 vs. 3303 - The Difference??

Does anyone know the specific difference or differences between caliber 3301 used in the Aqua Terra chrono and caliber 3303 used in the Speedmaster Broad Arrow? Both are based on the Piguet column wheel chrono movement, so I'm not sure of the exact differences between them. I know that caliber 3313 is the co-axial version of this Piguet movement and is used in the DeVille chrono, but I can't seem to find out what's different between 3301 and 3303. I'm looking into buying a chrono for my next Omega and would like to know more of the technical differences between these movements.

Keith? Georges? I'm sure one of you will know...

Thanks a lot.

-John

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Calibers 3301 vs. 3303 - The Difference??

Here ya go

movement finishing/decoration, nothing else

Thanks Keith and Doug....

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1 wallclock secs ( 0.18 usr + 0.02 sys = 0.20 CPU)