ETA 6497-1
ProbableUnitas 6497
Its size suits large cases, which is why Panerai adopted it for the early Officine Panerai watches as the base of the OP series. Small seconds at 9 (6497) versus at 6 (6498) is the practical distinction between the two.
Specifications
- Movement manufacturer
- ETA
- Frequency
- 21,600 vph (3 Hz)
- Jewels
- 17
- Power reserve
- 46 hours
- Diameter
- 36.6 mm
- Winding
- manual
Architecture
Large manual-wind pocket-watch caliber with small seconds at 9 o'clock.
Related calibers
Derivative
OP X (Unitas/ETA 6497 base)
References using this caliber
No catalog references are linked to this caliber yet.
Provenance of this record
Sources & Evidence
Secondary sourceCollector research
Ranfft Watch Movement Archive
Dr. Roland Ranfft (archived and maintained by volunteers)
- Accessed
- 2026-08-18
Cited for
This referenceProbable
Last verified: Not yet reviewed