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Re: Opinions on Omega 1120???

In Response To: Re: Opinions on Omega 1120??? ()

: 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.
Ther are two categories of nivarox far hairsprings 1 & 2. Omega uses the second. IWC just give a yellow gold finish to their watches and submit their movements to isochronic tests and they are adjusted to run only from 0 to +7 sec per day.
I don't think it is a question of flatness of the movement. Omega changed the rotor in order to gives a maximal efficiency during winding this allowing the hairspring to be consistently armed.
The power reserve of the 1120 is 44 hours against 42 hours for the breitling cal 17 and teh iwc version of the eta 2892.