The Hybris Mechanica a Grande Sonnerie is among the most complicated wristwatches ever made; secondary prices when examples appear at auction are highly variable and dependent on provenance, but the reference consistently sets benchmarks for what in-house complication watchmaking achieves.
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.
Purchase only with full JLC certificate of authenticity and complete service records; all three striking modes must function correctly.
| Area | What to check | What is correct | Red flag |
|---|---|---|---|
| caseback | Cal. 177 with 1,366 parts | Cal. 177 visible through caseback; complex bridge layout consistent with grande sonnerie documentation | Any caliber other than 177; movement bridge layout inconsistent with JLC documentation |
| crown | All three striking modes function | Grande sonnerie sounds hours and quarters on each quarter; petite sonnerie sounds hours on each hour; minute repeater sounds on demand via slide | Any striking mode that does not function; striking that sounds incorrect count or sequence |
| dial | Hybris Mechanica dial configuration | Dial configuration matching JLC Hybris Mechanica reference photography; tourbillon and complication indicators all present |
Editorial estimate. Actual prices vary by condition, date, and box/papers status. Live pricing data is in development.
| Any dial element missing or inconsistent with JLC Hybris Mechanica documentation |
