Et nærmere kig på ETA 2892

[hannover_dk]

Jep den er god nok absolut.
Husk at 2892 kan være to ting (faktisk 4 forskellige, En basis version -standard og Elabore, og en TOP og en chronometer - som koster forskelligt og er forskelig i ebauche opbygningen. Jeg saksede den her til mit arkiv en gang - himmel den er lang, men et hurtigt blik siger først noget om forskellene i dele, og så om performance - mellem sådanne 2 2892 maskiner. Hvordan man ved hvad der ligger i et specifikt ur? Ud over måske at gætte ud fra fabrik og pris, aner jeg det ikke.
Shortly: Basicly it is the same movement but ETA movements are available in different grades.


Standard and Elaboré: (OPBYGNING)
Mainspring - Nivaflex NO
Shock protection - Etachocs
Pallet stones - Polyrubies, Epilame-coated
Balance - Nickel gilt
Balance staff - Epilame coated
Collet - Nivatronic
Hairspring - Nivarox 2
Hairspring heat treatment - Etastable

Top and Chronometre: (OPBYGNING)
Mainspring - NivaflexNM
Shock protection - Incabloc
Pallet stones - Red rubies, Epilame-coated
Balance - Glucydur gilt
Balance staff - Epilame coated
Collet - Nivatronic
Hairspring - Anachron
Hairspring heat treatment - Etastable

The performance differences are the big differences between the various grades: ("The limit values are subject to interpretation: 95% of the pieces delivered in a lot must be within the specified limits.")

Standard:
2 positions (CH, 6H)
daily rate: +/-12 sec/day
Maximum positional variation: 30 sec
Isochronism (between 0 and 24 hours): +/- 20 sec

Elaboré:
3 positions (CH, 6H, 9H)
daily rate: +/-7 sec/day
Maximum positional variation: 20 sec
Isochronism (between 0 and 24 hours): +/- 15 sec

Top:
5 positions (CH, FH, 6H, 9H, 3H)
daily rate: +/-4 sec/day
Maximum positional variation: 15 sec
Isochronism (between 0 and 24 hours): +/- 10 sec

Chronometre:
As per COSC specifications, which as far as most owners will notice, isn't much different from Top grade.

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