Live pricing is coming soon. Get notified when it is available for this reference.
Not yet rated
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.
Search pre-owned listings
Authentication
Verify COSC text on the dial only if the chronometer version is claimed; non-certified variants do not have COSC printed.
- Tissot offers the Gentleman with and without COSC certification; a seller claiming chronometer certification must be verified by the presence of COSC on the dial.
- The Silicium designation indicates a silicon hairspring; this is not visible to the naked eye but is relevant for long-term accuracy and anti-magnetic performance.
| Area | What to check | What is correct | Red flag |
|---|---|---|---|
| dial | COSC designation presence or absence | COSC printed on the dial if the chronometer-certified version is claimed; no COSC text on non-certified variants | Missing COSC text on a watch sold as chronometer-certified, or COSC text on a variant that should not have it |
| dial | Silicium designation text | Silicium printed on the dial of silicon hairspring variants; consistent font with the surrounding text | Inconsistent font weight or positioning of the Silicium text compared to surrounding dial printing |
| hands | Leaf hand finish | Leaf-style hands with consistent polished bevels and properly centered lume plots | Uneven bevel polish or off-center lume plots indicating non-original or damaged hands |
- COSC certification paperwork is part of the value claim; missing documentation is a negotiating point.
Authentication guide
The Gentleman Powermatic 80 Silicium is Tissot's slim dress-sport piece. Its 11.5mm height is thinner than it appears due to the case architecture. The silicon hairspring variant (Silicium) should be noted on the dial; any example claiming to be the Silicium variant without that text is not correct.






