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: A reference among movement is the 1120 better
: than the eta 2892-a2 version found in the
: IWCs and in the corums. In fact it is based
: on the legendary eta 2892-a2 but it is so
: heavily modified that I would consider it as
: almost in house. What are the modifiaction
: made by Omega? Two additional jewels in the
: winding system as well as smaller rotor
: balls (titanium), very specific rotor,
: nivarox far hairspring, rhodium plated
: finish, fausse côte de genève decoration,
: bevelled bridges and cosc certification.
IWC fans claim that IWC "heavily" modifies its ETA 2892's also. I'm not sure what the differnces are (the nivirox hairspring and the finishings noted appear common in higher end watches). But my question is this: Presumably Omega made improvements to the winding system because it wished to use a different rotor -- if so, then the real question is why did Omega change the rotor? -- I can only think of two reasons:
- to keep the movement as flat as possible
- to make it as rugged as the 2824
The improved winding efficiency doesn't appear to manifest itself in terms of better power reserve over that of Breitling or IWC.
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