Identify the issuer
Remaining manufacturer coverage, a third-party service plan and a dealer promise create different claims processes. Confirm who decides whether a fault is covered and who pays shipping.
Read the exclusions
Water damage, impact, magnetism, cosmetic parts, straps and signs of third-party opening are often excluded. A headline duration says little without the covered failure list.
Check transferability
Some manufacturer and dealer warranties follow the watch; others apply only to the original purchaser. Ask for the written terms rather than relying on the listing summary.
Separate warranty from service
A watch can have warranty time remaining and still need regulation, pressure testing or preventive work outside the covered scope. Recent documented service can reduce different risks.
Keep a reserve anyway
Even strong coverage creates downtime and shipping friction. Price the watch so an uncovered issue does not turn a confident purchase into an urgent financial problem.