Q&A Seiko Marinemaster (Ask questions about mm300)
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Thread: Q&A Seiko Marinemaster (Ask questions about mm300)

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  1. #1
    Member //Napoleon//'s Avatar
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    Q&A Seiko Marinemaster (Ask questions about mm300)

    Seems like the seiko marinemaster is one of the most popular watches on WUS right now.
    I've owned the marinemaster for quite a while now, and I still have questions that I don't have answers to.
    I guess this can be a thread where people can ask questions, and get answers from current/previous owners of the watch

    1) How antimagnetic is the watch?
    2) I read somewhere that seiko made a modification to recent marinemaster crown stems to reduce the chance of cross-threading. Can anyone verify this?
    3) I also heard that the 8L35 movement are hand-assembled by one of the twenty grand-seiko watchmakers. I highly doubt this... wouldn't the watch be priced a lot higher if true?
    4) Anyone know the grade of steel? I am guessing something equivalent 316L...

    And to make the thread less boring, try to post some pics as well
    Here's my marinemaster:

    And the 8l35 movement shamelessly taken from internet:

  2. #2
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    Re: Q&A Seiko Marinemaster (Ask questions about mm300)

    CitizenM where ru??
    CitizenM and eliz like this.


  3. #3
    Member Ottovonn's Avatar
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    Re: Q&A Seiko Marinemaster (Ask questions about mm300)

    I used to own the MM300, so I'll try to answer one of your questions. I read a while back that newer models produced from 2008 onwards have cross-threading resistant crowns. I'm still unsure about the accuracy of this statement.

    You might have better luck in the Seiko forum where the majority of the experts (Seikoholics) reside.
    Just your average Japanese watch fan: Casio, Citizen, Seiko

    View my collection **here**

    View my feedback by clicking **here**

    Your friendly neighborhood enabler,

    Otto

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  5. #4
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    Re: Q&A Seiko Marinemaster (Ask questions about mm300)

    Actually can the mods not move this? This cld be quite interesting..


  6. #5
    Member CitizenM's Avatar
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    Re: Q&A Seiko Marinemaster (Ask questions about mm300)

    Quote Originally Posted by //Napoleon// View Post
    Seems like the seiko marinemaster is one of the most popular watches on WUS right now.
    I've owned the marinemaster for quite a while now, and I still have questions that I don't have answers to.
    I guess this can be a thread where people can ask questions, and get answers from current/previous owners of the watch

    1) How antimagnetic is the watch?
    2) I read somewhere that seiko made a modification to recent marinemaster crown stems to reduce the chance of cross-threading. Can anyone verify this?
    3) I also heard that the 8L35 movement are hand-assembled by one of the twenty grand-seiko watchmakers. I highly doubt this... wouldn't the watch be priced a lot higher if true?
    4) Anyone know the grade of steel? I am guessing something equivalent 316L...

    And to make the thread less boring, try to post some pics as well
    Here's my marinemaster:

    And the 8l35 movement shamelessly taken from internet:
    Can't answer all of them, but here's my best guess:

    1: I believe it's the magnetic resistance standard, which is 60 gauss (ISO764:2002). Could be wrong on that, but almost all Seikos (barring their special anti-magnetic models) are rated for that. Of course, that's just the standard, who knows if they're actually more resistant in real life.
    2: Not sure about that one.
    3: I'm pretty confident the 8L35 is assembled in the Grand Seiko mechanical shop. Now THAT said, it is not an adjusted movement and isn't guaranteed to the GS standards, so while it's put together by same individuals, it's not put through the paces and fine tuned in the same way as the 9S55 (the Grand Seiko version).
    4: I think you're correct.
    //Napoleon// likes this.

  7. #6
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    Re: Q&A Seiko Marinemaster (Ask questions about mm300)

    I only have one question.

    Can one of you sell me your MM for next to nothing?

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