STP1-21
Factory specs
- Caliber
- STP1-21
- Made in
- Switzerland
- Frequency
- 28,800 bph (4 Hz)
- Power reserve
- 41 h
- Jewels
- 26
- Hacking
- Yes
- Hand winding
- Yes
- Accuracy
- 0 / +15 s/day
- Diameter
- 26 mm
- Height
- 4.6 mm
- Functions
- Hours, Minutes, Seconds, Date
- Clone of
- ETA 2824-2
- Equivalent to
- STP1-11
- Same family
- STP1-11
Automatic from Swiss Technology Production (STP, also SwissTP), the Fossil Group's movement factory; the successor to the STP1-11 (ETA 2824-2 based), which it officially replaced in January 2022 and with which it is interchangeable as a whole movement. Figures from Caliber Corner, which quotes STP's technical documentation (2019, updated February 2023): 11½ lignes, 26mm overall (25.60mm casing diameter), 4.6mm high, 26 jewels, 28,800 vph, accuracy 0 to +15 s/day, lift angle 50°, bidirectional rotor, hand winding, hacking, quick-set date at 3 (6 possible), Incabloc, Nivaflex NM mainspring. Power reserve: STP's announcement to suppliers said the new barrel moves "from 44H to 41H" (recorded as 41); Caliber Corner's table gives 38~41 hours and some watch brands quote 40 hours. Offered in a Standard finish (sandblasted rhodium, decorated rotor) and an Elaboré Soigné finish (decorated plates and bridges, blued screws). A manual-wind STP1-21M (3.7mm) also exists. No STP spec sheet was fetched.
Watches with the STP1-21
| Watch | Price from | Movement | Dia. mm | Thick mm | Crystal | Micro-adjust |
|---|---|---|---|---|---|---|
 Ocean To Orbit Lhotse |
$995 | STP1-21 | 38.5 | 11.5 | Sapphire | Tool (pin holes) |