What is your most accurate mechanical watch?
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  1. #1
    Member Carrera997's Avatar
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    What is your most accurate mechanical watch?

    If you own two or more mechanical watches which one provides the best accuracy? Estimates welcome. Post a photo of it if you can.

    Mine is a Franck Muller 6850 SC which averages 3.5 seconds over 5 days.






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    ​Steve the watchaholic

  2. #2
    Member EnderW's Avatar
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    Re: What is your most accurate mechanical watch?

    ElPrimero runs close to +1 seconds a week. Granted it's rare for me to wear same watch for more than a couple days, but if I travel or something - been seeing impressive accuracy with it. (and yes, it does not hack, so I backhack it occasionally to get exact timing vs atomic clock).


    Omega SMP has been +3 seconds a week consistently for 10+ years. Never serviced or opened and not touching it now. And that's with a mere ETA 2892
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    Last edited by EnderW; September 15th, 2017 at 05:11.
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  3. #3
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    Re: What is your most accurate mechanical watch?

    Steinhart bronze flieger with unitas manual wind.
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  5. #4
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    Thumbs Up Re: What is your most accurate mechanical watch?

    At the moment it's a tie between my Lucien Piccard and Rainer Nienaber.

  6. #5
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    Re: What is your most accurate mechanical watch?

    Wait...... the Zenith Primero is such an accurate watch... but it doesn't hack????? What?!?!?


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  7. #6
    lvt
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    Re: What is your most accurate mechanical watch?

    My Steinhart O1 GMT is actually my most accurate automatic watch.

    It gains consistently 1.5s per day.

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    Ball - Casio (G-shock) - HMT - Longines - Parnis - Seagull - Steinhart - Tissot - Victorinox - Yema

  8. #7
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    Re: What is your most accurate mechanical watch?

    My most recent aquisitions:

    My Explorer 1 214270 mk.2 started life at about +2.5spd but settled to +2.0, just within Rolex's stated spec.
    My Seiko SLA017 obtained in July this year started at +4 in the first couple of weeks, went down to +3.5 for a while and now settled to +3.

    Very happy with both, but most accurate is my older Omega AT with the 2500b coaxial movement (still 28,800bph before the switch to 25,200bph in the 'c' version) which was running slow at -7spd but after a recent service at an independant specialist in August is now -0.5spd.

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    Last edited by obomomomo; September 15th, 2017 at 05:26.
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    Bulova> 96A225. Casio> 5600E. Damasko> DS30. GrandSeiko> SBGH205. Rolex> 116500LN, 16710, 214270. Seiko> SARB017, SARB033, SARG007, SBDX017, SLA017, SRP777.

  9. #8
    Member cuthbert's Avatar
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    Re: What is your most accurate mechanical watch?

    Definitely the Hanhart Tachi-Tele with manual winding 7760:

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    5 seconds per 31 days...evidently adjusted by the faeries of the Black Forest in Germany.
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  10. #9
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    Re: What is your most accurate mechanical watch?

    Currently I have a Ginault Ocean Rover that has averaged +0.1sec/day over the last 3 months.

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  11. #10
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    Re: What is your most accurate mechanical watch?

    Right now it's probably my North Flag, but in fairness, my GS Hi-Beat and AT8500 are a lot older.

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