Bulova Sea King 737 Movement Removal

Discussion in 'Watch Repair' started by Maz, Jun 30, 2020 at 2:45 PM.

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  1. Maz

    Maz Registered User

    Jun 10, 2020
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    I've recently purchased this Bulova Sea King 737 (11BLC Caliber) to practice disassembly and reassembly but before i've even removed the movement from the case i have an issue.

    s-l1600_(5).jpg

    I've removed the case back and the two screws holding down the movement but i'm struggling to take the movement out of the case. There is a spacer ring holding the movement but there seems to be an additional brass c-shaped ring between the spacer ring and case with a lip which the spacer ring is underneath so there does not seem to be any obvious way to get the movement out.

    IMG_20200630_191607.jpg IMG_20200630_185728.jpg

    I've considered this may be a front loaded watch but there is no obvious markings to denote this.

    Has anyone worked with a similar watch and can advise how to get the movement out please.

    Thanks in advance.

    Maz
    My watchmaking journey!
     
  2. Chris Radek

    Chris Radek Registered User
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    Apr 13, 2014
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    That C shaped ring is probably in a groove in the case and will just come out. It is probably a bit springy and will be easy to reinstall later.

    You could also pull the crystal and then the dial and movement will come out the front, but that looks like a tension ring crystal so it may be a bit harder to do than usual.

    The Bulova "Sea Whatever" cases are various waterproof experiments and they can be interesting/challenging. I think some of them are really cool.
     
  3. roughbarked

    roughbarked Registered User

    Dec 2, 2016
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    Longines used a similar ring but at least they put holes in the ends to put a tool in.
     
  4. Maz

    Maz Registered User

    Jun 10, 2020
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    Thanks Chris Radek , but come out how, i can fully rotate the spacer ring and movement but there is no obvious way that either unhooks from the C shaped ring to become free.

    I have not tried removing the crystal as i do not have the relevant tool or aware of the correct technique to do so. Can you advise how i can do this please?
     
  5. roughbarked

    roughbarked Registered User

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    Try tweaking either end of the C ring out of the groove. It should spring out.
     
  6. Maz

    Maz Registered User

    Jun 10, 2020
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    Thanks roughbarked , from the rear of the case?
     
  7. roughbarked

    roughbarked Registered User

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  8. roughbarked

    roughbarked Registered User

    Dec 2, 2016
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    If you are only practicing disassembly be careful. The centre seconds pinion is easily lost and the third wheel may be damaged in attempting to remove the wheel pushed on it.
     
  9. Maz

    Maz Registered User

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    Thanks roughbarked that worked, it's so simple when you know how :)

    Thanks for the other tips too, this is actually part of a course i am undertaking, think this is now the 6th different caliber we have worked on.
     
  10. roughbarked

    roughbarked Registered User

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    If you aren't worried about originality and it is your watch, you may wish to drill a hole in each end of the spring holder to make it easier for next time.
     

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