Watchmaker Notes on iPhone: Caliber Reference, Parts Sourcing & Service Observations

Note-Taking for Watchmakers and Watch Repair Technicians

Watchmaking requires encyclopedic knowledge of hundreds of caliber-specific service procedures, parts specifications, and tolerance requirements. A working watchmaker services movements from pocket watch era through modern Swiss manufacture, each with its own service intervals, jewel layouts, mainspring specifications, and common failure modes.

No human brain holds all of it reliably. Nemos becomes your personal service reference library, built from your own bench observations.

What Watchmakers Track

Movement-specific notes: - Caliber identification notes and cross-reference marks - Jewel count and layout notes for unfamiliar calibers - Mainspring dimensions and replacement part numbers - Common failure modes per caliber (stem wear in X movement, cannon pinion slippage in Y) - Service interval recommendations by caliber

Parts sourcing: - Spare parts supplier contacts (Cousins UK, Ofrei, Jules Borel, RGM for vintage) - NLA (no longer available) parts workaround notes - Interchangeable parts cross-reference notes - Material supplier notes for watchmaking supplies (timing machines, oils, cleaning solutions)

Service observations: - End-shake and side-shake tolerance observations for tight-tolerance movements - Mainspring let-down procedure notes for unfamiliar barrels - Escapement adjustment approach notes per caliber - Shock setting installation notes (Incabloc vs. Kif vs. proprietary)

Client and commission: - Watch identification notes (reference number, serial number cross-reference for dating) - Service history notes per piece (what was done, what was found, what parts replaced) - Estimate tracking notes

Building Your Personal Caliber Reference

After servicing a caliber for the first time, a 5-minute Nemos note on the specific quirks — the setting lever spring that's easy to lose, the cannon pinion that requires careful pressing, the stem that's non-standard — saves significant time the next time you see that movement. Most watchmakers see the same calibers repeatedly; documented observations compound.

FAQ

How is Nemos different from printed caliber references? Printed references give you specifications; Nemos captures your personal observations about that movement under your hands. "Eta 2824 crown wheel screws are reverse thread on watches before 1985" is the kind of hard-won note no catalog provides.

What parts sourcing notes matter most? NLA parts workarounds and interchangeable part numbers. When a critical part is discontinued, the substitute you found and tested is valuable institutional knowledge.

Should I keep client service notes? Client contact and service history notes in a personal system supplement your official shop records. Seeing a watch's history before the client calls about it is a real service advantage.

Is Nemos useful for vintage watch study? Absolutely — serial number dating tables, reference-to-movement cross-references, and authentication observation notes from watches you've examined are valuable personal reference.

What about notes from watchmaking school or certification? WOSTEP, BHI, or NAWCC course notes, timing and adjustment theory, and exam prep materials work well. Organized study notes are faster to review than full course materials.

How do I organize by manufacturer? Tags: `#eta`, `#peseux`, `#as`, `#longines`, `#omega`, `#rolex`, `#elgin`, `#hamilton`. Cross-reference with caliber number.

Related Reading

• Blacksmith Notes on iPhone
• Instrument Repair Notes on iPhone
• Jeweler Notes on iPhone
• Skilled Trades iPhone Workflow

Sources

• NAWCC (National Association of Watch and Clock Collectors) technical library resources
• BHI (British Horological Institute) service and examination standards
• Swiss movement caliber technical documentation and service manual references