ETA 6497-1
Factory specs
- Caliber
- 6497-1
- Made in
- Switzerland
- Frequency
- 18,000 bph (2.5 Hz)
- Power reserve
- 46 h
- Jewels
- 17
- Hacking
- No
- Hand winding
- Yes
- Accuracy
- —
- Diameter
- 36.6 mm
- Height
- 4.5 mm
- Functions
- Hours, Minutes, Small seconds
- Same family
- ETA 6498-1, ETA 6498-2
Hand-wound 16½-ligne caliber descended from the Unitas 6497 pocket-watch movement. It is the Lépine (open-face) layout of the Unitas pair: the small seconds sit in line with the crown, at 9 o'clock in a wristwatch, where the 6498-1 (savonnette/hunter layout) has them at 6. Otherwise the two share their dimensions and parts. Caliber Corner's 6497-1 listing: 16½ lignes, Ø36.6mm, 4.5mm high, 17 jewels, lift angle 44°, power reserve 46h, no hacking, Incabloc or Novodiac shock protection; its spec table gives "18,800 vph" while its text says 18,000, and ETA's technical communication for the twin 6498-1 gives 18,000 A/h, so 18,000 is recorded (brands that copy the table, Timefactors among them, quote 18,800). Brands quote power reserves from 44h to 53h; the 6497-2 is the upgraded version. No ETA grade tolerances were found, so no grades are recorded.
Watches with the ETA 6497-1
| Watch | Price from | Movement | Dia. mm | Thick mm | Crystal | Micro-adjust |
|---|---|---|---|---|---|---|
 Timefactors Precista Italian PRS-46 Lépine |
$680 | ETA 6497-1 | 44 | 12.5 | Sapphire | no bracelet |
 Astor+Banks AB Clásico |
$1,500 | ETA 6497-1 | 40 | — | Sapphire | no bracelet |