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On My Bench - Omega GSTP Pocket Watch - Caliber 38.5 L T1

  1. JimInOz Melbourne Australia Apr 9, 2019

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    What did I do today.

    Carried out some Nuclear Decontamination.

    This was the rad reading of the dial last week, the hands were even higher.

    Dial_Rad_Count.JPG

    Now they're all nice and clean.....................

    HandsCleaned.JPG

    .......and a lot safer.

    HandsNoRad.JPG
     
    WurstEver and Dan S like this.
  2. JimInOz Melbourne Australia Apr 9, 2019

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    And now with some safe lume.

    SafeLume1.JPG

    It even glows in the dark.

    LumeLight.JPG
     
    alam, Vitezi, gostang9 and 1 other person like this.
  3. verithingeoff Apr 9, 2019

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    Wow, that lume is fantastic Jim Swaggie.gif
     
  4. JimInOz Melbourne Australia Apr 9, 2019

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    :)

    The hour hand was a real PITA, don't know how those radium girls managed to get the big areas filled in so easily. Doing hundreds a day would help though.

    I think the colour turned out well for simulated aged radium, 3 drops of Humbrol clear matte, 1/2 a drop of Humbrol 94 Brown Yellow Matt and lume powder to the right consistency.

    The numbers on the dial will have to stay clean. I can do dial dots/markers and hands, but I'm not good enough to do numbers yet and I don't want to send you a crap job.

    A day away from the bench tomorrow as I've got to do some gardening for my mate and his wife so the lume will have time to dry properly.
     
  5. JimInOz Melbourne Australia Apr 22, 2019

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    Getting towards the end now.

    After the third adjustment I had the beat error down to 0.2 m/s.

    "I can do better than that!" I thought, so off with the balance again for a tiny weeny adjustment.

    Back on the timing machine and "Damn!!!!!! I must have looked at it the wrong way, and I don't remember sneezing when I did it.

    BeatError.JPG

    Time to walk away. I'll do it again tomorrow.

    I'm going to have a beer.
     
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  6. verithingeoff Apr 22, 2019

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    Hi Jim
    I was an engineer in the print industry for many years and I learnt when to walk away, take a deep breath.......and have a beer!:cool:
     
  7. JimInOz Melbourne Australia Apr 28, 2019

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    OK, back on track after a few days away from it.
    I think these results are satisfactory for a watch that's older than me.

    Crown Up.

    CrownUp_VTG.JPG

    Dial Up.

    DialUp_VTG.JPG

    Dial Down.

    DialDown_VTG.JPG

    Next is a power reserve check (with the new mainspring it should be good) and then I'll case it up and send it back to the owner.

    .
     
  8. tdn-dk Apr 28, 2019

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    Nice :)
    I can se you use 36 dg. Lift Angel. I have been looking lift angel for Omega pocketes and older watch calibers without any luck, most charts starts at cal. 161 (I guess a later version of the 38.5?) Have you found older charts or asume it is like the 161?
     
  9. JimInOz Melbourne Australia Apr 28, 2019

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    It was a matter of working forwards. Cal 38.5 was later re-designated 160/161/162/163, so I just used the lift angle for Cal 160.

    If I can't find an original technical guide for the caliber I use this excellent lift angle chart (Thanks to Christian Dannemann).

    Unfortunately I haven't found any charts/guides for older calibers in Omega.
     
  10. tdn-dk Apr 28, 2019

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    Looks similar to this one :)

    https://longines30l.com/wordpress/?page_id=597
     
  11. verithingeoff Apr 28, 2019

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    Looks like you hit the sweet spot there Jim:cool:
     
  12. Archer Omega Qualified Watchmaker Apr 28, 2019

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    If you don't know the lift angle of a particular watch, it's easy to find it. Starting with the watch fully run down, wind it until the balance amplitude can be seen visually to be 180 degrees. I use the "slo mo" video on my iPhone to verify this, and if required a marker can be used to place a small mark on the balance as a reference point for easier visualization. Once you know the amplitude is 180, put the watch on your timing machine and adjust the lift angle until the machine reads 180, and now you know the lift angle.

    Cheers, Al
     
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  13. JimInOz Melbourne Australia Apr 29, 2019

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    Thanks Al, i remember you explaining it some time ago but I never bookmarked it, will now though.

    Next question.
    One of the feet on the enamel dial has broken off.
    Two causes I think. First, it may not have been a good weld and second, I think it may have been heavily over tightened at some stage.

    The good one:

    90F0956A-30A6-4A05-90C1-771C993D15A0.jpeg

    The bad one:

    5F88A4FA-62AE-427B-8483-D7C1A6A21FCF.jpeg


    As much as I’m reluctant to use a dial dot, I think it may be my only option .
    Not being my own watch I’d rather not try to re-weld or solder it in case it causes the enamel to crack.

    Any suggestions?
     
  14. verithingeoff Apr 29, 2019

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    What's a dial dot?

    Geoff
     
  15. JimInOz Melbourne Australia Apr 29, 2019

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    https://www.ebay.com/itm/250-Dial-f...of-vintage-watches-spares-parts-/191336126581Purchases made through these links may earn this site a commission from the eBay Partner Network

    250 x dial feet stickers.

    These are great if your dial feet have broken from the dial, or if you are swapping a dial on a movement and the feet are not present or do not line up. The pads have been designed for this job.

    The pads hold the dial firmly but can be removed for future repairs.

    [​IMG]
     
  16. JimInOz Melbourne Australia May 1, 2019

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    Well at last, all complete and almost ready to send back to its owner.

    D7288225-C372-4966-AEBF-861F02B89C27.jpeg
     
  17. JimInOz Melbourne Australia May 1, 2019

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    Just need to do a power reserve check and then it's into the gentle care of Australia Post.

    E100D9B3-93B0-4B4A-B9E8-71DECF4BA2B0.jpeg
     
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  18. verithingeoff May 1, 2019

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    That looks fantastic Jim, now to find the right chain and fob

    Geoff
     
  19. JimInOz Melbourne Australia May 1, 2019

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    No probs Geoff.

    Being a GSTP/military tool watch. it'd probably be better on a leather or cord keeper.
    @Mad Dog is the man to consult on those options.
     
    DaveK likes this.
  20. verithingeoff May 1, 2019

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    Good idea Jim, I have some suitable leather cord

    Geoff