What Is a Chronometer?
A chronometer is a movement that passed independent accuracy testing, usually COSC to ISO 3159: 15 days, five positions, three temperatures, averaging between -4 and +6 seconds per day.
Read the guide → July 29, 2026 watch service intervalHow Often Should You Service a Mechanical Watch?
Modern intervals run roughly five to ten years depending on calibre. Service by symptom, accuracy drift, short power reserve or moisture, rather than by the calendar alone.
Read the guide → July 22, 2026 automatic vs quartzWhat Is the Difference Between Automatic and Quartz?
Quartz oscillates 32,768 times a second and runs within seconds per month; automatics are wound by wrist motion and drift seconds per day but remain repairable indefinitely.
Read the guide → July 15, 2026 watch water resistance meaningWhat Does Water Resistance on a Watch Actually Mean?
The metre rating is a static pressure test under ISO 22810, not a swimming depth. 30m is splash only, 100m suits swimming, and a real dive watch carries ISO 6425 certification.
Read the guide → July 8, 2026 watch complicationWhat Is a Watch Complication?
A complication is any function beyond hours, minutes and seconds, from a date window to a perpetual calendar. Each adds components, cost and servicing complexity.
Read the guide → July 1, 2026 watch power reserveWhat Does Power Reserve Mean on a Watch?
Power reserve is how long a fully wound mechanical watch runs before stopping, typically 38 to 70 hours. Above about 50 hours it survives a weekend off the wrist.
Read the guide → June 24, 2026 how to tell if a watch is realHow Do You Tell If a Watch Is Real?
External tells no longer separate good counterfeits from genuine watches. Movement finishing, calibre identity, reference numbers and provenance are the reliable checks.
Read the guide → June 17, 2026 do luxury watches hold valueDo Luxury Watches Hold Their Value?
Most depreciate. A small number of supply-constrained steel sports models hold or exceed retail, and their visibility distorts the general belief that watches are investments.
Read the guide → June 10, 2026