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Maintenance and value preservation

How maintenance, originality, functionality, cosmetics and documentation can affect future saleability.

Maintenance principles Environment and storage conditions Cleaning and surface care Routine checks and preventive maintenance Consumables and wear items Maintenance by gear type Long-term storage and inactivity Documenting maintenance and condition When to use a technician Maintenance and value preservation Maintenance checklists

In the used market, functional condition, cosmetics, originality and documentation do not always carry the same weight.

Proper maintenance should first prevent deterioration and failure. Trying to remove every mark may require polishing, refinishing or replacement that changes more value than it restores, especially on vintage items.

For a modern working instrument, reliability may matter more. Maintenance should fit the type of item and the market in which it belongs.

On some instruments, an original faulty or worn part may retain documentary value even if it is no longer suitable for use.

If replacement is necessary, photograph the previous configuration, record the reason and keep the component where it makes sense. Do not later present it as working if it is not.

Reversibility is not always possible or desirable, but knowing what was changed makes future valuation much more transparent.