Sellita SW261-1 M
Factory specs
- Caliber
- SW261-1 M
- Made in
- Switzerland
- Frequency
- 28,800 bph (4 Hz)
- Power reserve
- 42 h
- Jewels
- 24
- Hacking
- Yes
- Hand winding
- Yes
- Accuracy
- —
- Diameter
- 25.6 mm
- Height
- 4.35 mm
- Functions
- Hours, Minutes, Small seconds, Date
Hand-wound version of the automatic SW261-1 (see sellita-sw261-1): no rotor, small seconds at 6 and quick-set date at 3. Grail Watch Reference: Ø25.60mm (11½ lignes), 4.35mm high, 24 jewels, 28,800 vph, 42h power reserve, hacking seconds, in production since 2019. Its small-seconds pivot sits 7.6mm from the centre, against 6.4mm on the otherwise similar hand-wound SW216-1, which suits larger cases. Sellita's own documentation for this caliber could not be read (sellita.ch loads its caliber pages through a script and no datasheet URL was found), so no factory grades are recorded; brands quote 48h (DuFrane). Family set to "Sellita SW210", the hand-wound line, as for the other SW200 "M" calibers.
Watches with the Sellita SW261-1 M
| Watch | Price from | Movement | Dia. mm | Thick mm | Crystal | Micro-adjust |
|---|---|---|---|---|---|---|
 DuFrane Bergstrom MkIV |
$999 | Sellita SW261-1 M | 41.5 | 12.6 | Sapphire | Tool-free |