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Top-tier supplier movement
Large case: suits wrists 7 in+ (18 cm+)
44 mm case. A bold, statement-size wear. Best suited to larger wrists where the case sits flush.
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Authentication
Column-wheel chronograph architecture must be confirmed through the caseback; pusher action is the primary functional test.
Known issues in the market
- Pushers stick or do not return fully; the chronograph needs service and the column-wheel mechanism may have worn detents.
- Chronograph reset does not return seconds hand to zero; the heart-cam mechanism needs adjustment.
- Caseback shows a cam-based (non-column-wheel) chronograph; the movement has been swapped.
| Area | What to check | What is correct | Red flag |
|---|---|---|---|
| caseback | Column-wheel architecture visible through caseback | Star-shaped column wheel visible through the exhibition caseback; Longines finishing on bridges and rotor | Cam-lever mechanism without a column wheel; non-Longines finishing; a closed caseback on a watch sold as having exhibition display |
| case | Pusher at 2 and 4 action | Both pushers depress with light, clean resistance and return to full height immediately; no side play | Pushers that stick down; pushers that require heavy force; pushers with lateral play indicating worn gaskets or guides |
| dial | Chronograph subdial alignment | Running seconds and elapsed time subdials are centered at their respective positions; both register hands park at zero at rest | Subdial hands that do not park at zero; hands that stop at inconsistent positions after reset; subdial printing that is offset from the hands |
Common legitimate replacements
- Pusher gaskets wear with use; replacement gaskets are standard but must be replaced to maintain any water resistance.
- Chronograph hands are fragile and sometimes replaced; verify the blued or painted hands match the original specification.
Expert resources: Longines.com Master Collection documentation. TimeZone Longines forum for Cal. L688 column-wheel chronograph service history and identification.
Authentication guide
Last reviewed June 2026
The column-wheel chronograph in the L888.4 is unusual at this price point. The 44mm case is large; the column-wheel mechanism is the value proposition and the authentication focus.
Sources: Monochrome — Master Chronograph review.






