Service Checklist (COR)

  • Fully disassemble watch, removing all cap and hole jewels and clean in a three solution agitation cleaner
  • Inspect escapement assembly for wear and damage (pallet jewels, pivots and hole jewels)
  • Inspect balance assembly, including pivots, and jewels for wear
  • Inspect the gear train (including mainspring barrel) for wear at pivots, jewels, and bearing holes.
  • Install new mainspring if needed (not necessarily included in a service)
  • Inspect keyless mechanism and motion work.
  • Remove all cap jewels and end-stones.


  • Polish jewel holes with pegwood.
  • Oil and replace all cap jewels and end-stones.
  • Oil all bearing holes (jeweled and non-jeweled)
  • Oil pallet jewels
  • Oil Canon Pinion


  • Bring regulator within 50% of either  side of center
  • Check balance to ensure sufficient amplitude
  • Adjust regulator on timing machine
  • Check positional error for extremes
  • Bench test for 2 days