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Top-tier supplier movement
Medium-large: suits wrists 6.5 in+ (16.5 cm+)
40 mm case. Wears confidently on average to larger wrists. May overhang on slender builds.
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Authentication
The ETA 6498-1 nearly fills the caseback window; any small-diameter movement visible through the back has the wrong caliber.
Known issues in the market
- The ETA 6498-1 is a large-diameter pocket-watch caliber adapted for wristwatch use; it appears much larger than a typical wristwatch movement through the caseback.
- Any caseback showing a small-diameter rotor or movement has an incorrect caliber installed.
| Area | What to check | What is correct | Red flag |
|---|---|---|---|
| caseback | ETA 6498-1 large-diameter movement | Large-diameter hand-wind movement nearly filling the exhibition caseback window; consistent with pocket-watch caliber proportions | Small-diameter movement or automatic rotor visible through the caseback; incorrect caliber installed |
| dial | Petite seconde sub-dial position | Running seconds sub-dial positioned at 6 o'clock; correctly centered within its aperture | Off-center sub-dial or seconds hand at the center of the dial rather than the petite seconde position |
| crown | Manual-wind crown function | Crown winds the 6498-1 mainspring smoothly; two-position pull for time-setting | Crown that does not wind or slips; indicates mainspring or keyless works issue in the 6498-1 |
Common legitimate replacements
- ETA 6498-1 service is widely available; the caliber is used across many brands and watchmakers are familiar with it.
Expert resources: Tissot Heritage Petite Seconde documentation at tissotwatches.com. ETA 6498-1 technical documentation for caseback visual identification.
Authentication guide
Last reviewed June 2026
The Heritage Petite Seconde is a manual-wind watch powered by the ETA 6498-1, a large pocket-watch-derived caliber. The movement is visible through an exhibition caseback and is notably oversized relative to other movements at this price point. The small seconds subdial sits at 6 o'clock.






