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  1. Locrian

    Locrian Aug 2, 2020

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    Hey, I'm looking to adjust my cal. 552 (swan neck), but not sure what screwdriver size I should use. Does anyone know? Thanks!
     
  2. SurvivingJoe

    SurvivingJoe Aug 2, 2020

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  3. Archer

    Archer Omega Qualified Watchmaker Aug 2, 2020

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    One that fits. I usually use a 0.6 mm.