Define what papers mean
A dated warranty card, sales receipt, service invoice and generic instruction booklet are not equivalent. Identify the document, whether it matches the watch and what it actually proves.
Let the reference set the premium
Collectible, discontinued and tightly documented references may carry a meaningful full-set premium. Common current-production watches often show a smaller spread, especially when warranty has expired.
Prioritize service evidence
A credible invoice describing recent work can matter more to near-term ownership cost than an original box. Service paperwork should still be checked for reference, serial and scope.
Price missing accessories honestly
Correct bracelets, clasps, links, bezels and special tools can be expensive or difficult to replace. Generic packaging is rarely a substitute for reference-specific hardware.
Pay only for usable provenance
The premium should reflect stronger confidence, easier resale or genuinely scarce completeness. If the watch is over-polished, incorrect or poorly serviced, the box is mostly expensive storage.