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Originality and value

How aftermarket parts affect watch value

Aftermarket parts usually reduce collector confidence and can reduce value, but the effect depends on what was changed and whether the original components remain. An aftermarket strap is not assessed the same way as a refinished dial, modified case or non-original diamond setting.

8 minute readPublished by Lost WatchesAustralia
Black-dial IWC Pilot Chronograph on a black leather strap

What counts as an aftermarket part

Aftermarket generally means a component not supplied or authorised by the watch manufacturer. Common examples include dials, bezels, diamond settings, bracelets, straps, crystals and movement parts.

A genuine manufacturer service replacement is different: it may be authentic to the brand but later than the watch’s original production. Both situations should be described accurately.

Changes do not affect every watch equally

A replaceable leather strap may have a modest effect when the original buckle is retained. A non-original dial or altered case can change the watch’s identity, collector appeal and whether a buyer can confidently represent it later.

Added diamonds deserve particular care because the setting may remove metal or cover reference marks. Material value does not automatically recover the loss of originality.

Original parts can preserve options

Submit removed dials, bezels, bracelets, links, buckles and hands with the watch. Even worn components may allow a future return to the correct configuration or provide useful evidence about its history.

Do not refit delicate parts at home. Photograph them separately and let the assessor decide whether specialist handling is appropriate.

How to request an accurate quote

State which modifications you know about, who performed them and whether invoices or original pieces remain. Include clear front, side, caseback and clasp photographs without filters.

If you are unsure, say so. Clear information helps the buyer quote accurately, followed by routine authentication after acceptance.

A quote is specific to the watch.

Guide content is general information. A direct-purchase quote is based on the details and photographs you provide. If a material difference is found, we contact you before any change is made.

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