Pre-owned watches trade across a wide condition spectrum. These ranges are typical for the secondary market.
The Master Grande Tradition Gyrolab uses a bi-axial gyroscopic regulator in place of a traditional balance wheel; secondary prices reflect the movement's technical originality and JLC's position as the manufacture des manufactures.
Editorial estimate, 2026 Q2. Actual prices vary by condition, date, and box/papers status.
Community + OSINT signals haven’t landed for this reference yet. We don’t publish a rating against zero signal — the number would mean nothing. Editorial body + caliber + market value still surface above; ratings appear once the signal corpus does.
The Gyrolab titanium balance is a non-circular oscillator visible in the tourbillon; any irregular motion requires immediate JLC service.
| Area | What to check | What is correct | Red flag |
|---|---|---|---|
| dial | Gyrolab titanium balance oscillation | Non-circular titanium balance oscillating freely in the tourbillon cage; tuning fork profile clearly visible at the 12-position | Circular balance wheel in the tourbillon; any irregular oscillation rhythm or stopped tourbillon |
| caseback | Cal. 986 manual-wind movement | Cal. 986 visible; manual-wind movement without rotor; complex bridge architecture consistent with JLC documentation | Any automatic rotor in a watch that should be manual-wind; caliber number inconsistent with 986 |
| case | Tourbillon cage condition at 12 | Tourbillon cage rotating freely at approximately one revolution per minute; cage structure complete with no missing components |
The Gyrolab replaces the traditional lever escapement and balance wheel with a gyroscopic regulating organ: two arms rotate in a circular path, replacing the oscillating balance. The Gyrolab mechanism is visible through the partially skeletonized dial and it is the sole authentication point that matters at the movement level. If the mechanism rotates continuously rather than oscillating, it is a Gyrolab.
| Stopped or stuttering tourbillon; visible damage to cage structure |
| All current production | Partially skeletonized dial exposing the Gyrolab regulating organ in motion. The two rotating arms of the Gyrolab are visible at the center of the dial or in a sub-aperture, depending on the variant. |
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