Issue I  ·  Workshop Edition

Barrel&Arbor

A small collection of free tools for watchmakers — built by someone early in the hobby, for everyone else learning alongside.

No ads, no accounts, no tracking. Calculators, printable forms, and reference material that I wished existed when I started taking movements apart.

Free Open Print-ready Offline-capable

Watchmaker's bench from above: green cutting mat, brass loupe, notebook.

§ Calculators

  1. MainspringDennison & Grossmann formula, rule of thirds
  2. Unit ConverterLigne, millimeters, inches, mils
  3. Pocket Watch SizesAmerican sizes 0s–18s to mm & ligne

§ Printable Forms

  1. Repair IntakeCustomer & watch details, authorization
  2. Service RecordFull workshop tracking sheet
  3. Timing SheetSix positions, before & after
  4. Timegrapher ResultsWitschi / Weishi reading log
  5. Tray Map36-cell numbered teardown grid

§ Reference

  1. Pocket Watch GuideAnatomy, eras, manufacturers
  2. Identify Your WatchInteractive flowchart
  3. Tools & BooksRecommended for the bench