What does “Aftermarket” mean?

Aftermarket means any part that was added to a watch after it left the factory and was not made by the watch brand. Common examples are aftermarket diamond bezels, dials, bracelets, bezel inserts, crowns and straps. A watch with aftermarket parts is no longer in its original factory condition.

Disclosure is essential. Aftermarket parts usually reduce the value of a watch, often significantly for luxury models, and many buyers will avoid them entirely. Brand service centres may also refuse to service modified watches, or insist on replacing the aftermarket parts with genuine ones at the owner's expense. Every aftermarket part should be clearly stated in a listing, and sellers should not describe these parts in a way that suggests the brand made them. Buyers check photos carefully for signs such as uneven stone setting or markings that do not match the reference.

Typical usage: “Datejust 36 with aftermarket diamond bezel and aftermarket dial, original case, bracelet and movement, priced accordingly.” Honest disclosure like this builds trust.