The secondary watch market delivers an opportunity to references often unavailable at retail. Verifying authenticity is the central concern. Case and movement numbers should match papers. Documented servicing influences both condition and value.
Original box and papers add a definite premium in the secondary market. The guarantee card confirms when and where it was sold and assists authenticity. Missing documentation need not mean a cause for concern, although this commands reduced value.
Resale value varies enormously between brands and references. Stainless sports references by the strongest brands often sell over list price, whereas complicated dress watches commonly depreciate. Originality and documentation govern value between examples.
Mechanical watches need periodic servicing to keep running accurately. Service intervals range by manufacturer, usually falling around every five to seven years. Overhaul means complete disassembly and see used rolex listings rebuild. Deferring service can cause expensive repairs.