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That's not entirely accurate. The Omega 1120 is a highly modified ETA 2892A2.
I don't recall the source of the following description of the Omega 1120. I hope I don't offend anyone by using it without permission.
"Besides polishing the parts, and adding the Geneve Wave decor, they add an Omega only rotor that rides a small ball bearing. They change the
automatic bridge with a their own gear-train and endshake corrector. Which in turn, reduces the height difference between the auxiliary reverser and rotor. This also allows the oscillating weight's gear to mesh more precisely with the click wheel. This modification reduces the rotor's play during movement, and also prevents friction against the plate. On a standard ETA ebauche, a metal seating is used to hold the
barrel in place. Omega replaces that, and uses two jewels to hold the barrel in place. This improves the constancy of the force flow and
ultimately produces a more accurate movement, and adds about 2 hours to the power reserve. And to top all that off, add pure gold inlaid
engraving for the writing"
: OK, but how does this difer from the run of the
: mill ETA automatic movement that everyone is
: using, including Omega? You did know that
: the ETA mechanical movements that are built
: into Omegas are also the same ETA mechanical
: movements that are build into Swiss FAKE
: Rolex replicas, American Hamiltons, and
: practically every other "run of the
: mill" watchmaker's product aren't you?
: It's the same exact movement minus the cost
: of having it certified. So, how does this
: differ in any significant way from the
: "run of the mill" ETA quartz
: movement that goes into the Omega Quartz
: models.
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