Rolex
Rolex officially recommends a full service approximately every 10 years, conditional on the watch performing within COSC tolerances and showing no visible damage. Older references may benefit from shorter intervals.
Omega
Omega's published guidance is 5–8 years for most modern Master Chronometer references. Speedmaster Professional manual-wind movements may benefit from slightly more frequent attention given the manual-wind cycle.
Patek Philippe
Patek recommends servicing every 3–5 years, reflecting the higher complication content typical of the brand. Patek's lifetime servicing programme covers every watch the brand has ever made.
Audemars Piguet
AP recommends a service interval of approximately 5 years, with longer intervals acceptable for time-and-date references in light use.