STP6-15

Swiss Technology Production (STP) · Automatic · Upper tier · Family: STP1-11

Factory specs

Caliber
STP6-15
Made in
Switzerland
Frequency
28,800 bph (4 Hz)
Power reserve
44 h
Jewels
26
Hacking
Yes
Hand winding
Yes
Accuracy
—
Diameter
25.6 mm
Height
4.6 mm
Functions
Hours, Minutes, Seconds, Skeleton
Same family
STP1-11, STP1-21

Fully skeletonised automatic from Swiss Technology Production (STP, the Fossil Group's movement factory), introduced in 2016 alongside the open-heart STP5-15. Grail Watch: based on the STP1-11 (itself an ETA 2824-2 equivalent) with no date, 11½ lignes (25.60mm), 4.60mm high, 26 jewels, 28,800 vph, 44h power reserve from a longer, thinner mainspring, hacking seconds, hand winding, bidirectional central-rotor winding; the skeleton versions leave the regulator's adjusting screw unused. No STP technical sheet was read, so no accuracy figure is recorded. Tier "upper" as a member of the STP1-11 family.

Watches with the STP6-15

WatchPrice fromMovementDia. mmThick mmCrystalMicro-adjust
Colomer & Sons Antarctica $2,806 STP6-15 40 — Sapphire no bracelet

Sources