Chronoswiss Opus
Debuted 1995 as the world's first serially produced automatic skeleton chronograph; continues today as the Opus Chronograph line built on Chronoswiss's C.741S caliber (Valjoux 7750 based).
1 reference
| Reference | Variant | Years | Dial | Size |
|---|---|---|---|---|
| CH-7543.1S-SI | Opus Chronograph, steel, skeletonized | Not recorded | Not recorded | 41 mm |