Grail Watch Reference

A Reference Library for Watches from Grail Watch

  • Movement Database
  • Grail Watch Blog
  • The Watch Files Podcast
  • Reference Documents
  • About Grail Watch
  • Email
  • Instagram
  • LinkedIn
  • Twitter

Powered by Genesis

You are here: Home / Movements / STP6-15

STP6-15

Last Update: June 13, 2019

Brand:STP
Family:
STP1-11 Family
Height:4.60 mm
Jewels:26
Reserve:44 hours
Frequency:28,800 A/h
Winding:Automatic, Bi-Directional Automatic Winding, Central Rotor Automatic Winding
Diameter:25.60 mm (11.5 ligne)
  Complications:Hacking Seconds, Hand Winding
Hands:Central Hour Hand, Central Minute Hand, Central Seconds Hand
Distinguishing Technical Characteristics
Central-Rotor Automatic
Clockwise Balance Cock
Screw Regulator
Central Rotor
Production: 2016 – Current
1910s 1920s 1930s 1940s 1950s 1960s 1970s 1980s 1990s 2000s 2010s 2020s

STP6-15 is a skeletonized automatic watch movement from Swiss Technology Production. It is based on Cal. STP1-11, itself a clone of the popular ETA 2824-2. STP uses a longer, thinner mainspring, boosting power reserve to 44 hours. It also includes an extra jewel on the barrel arbor.

Cal. STP6-15 and the open heart Cal. STP5-15 were introduced together in 2016.

Like other movements in the STP1-11 family, it uses a screw-type regulator with two “jaws” for adjustment. However the screw is not used in the skeletonized versions, with the “jaws” left open and an index inscribed on the opposite bridge.

STP may have used an ebauche from Sea-Gull in China to build the STP1-11 family. Photos on the company web site previously included the label, “ST2100”, which is the identifier found on the Sea-Gull ST2130 movement. The same has been said of the Valanvron VAL-24. Due to their Swiss content and finishing, STP can legally classify these movements as “Swiss Made”, and the company may now construct most or all of the movement in-house.

The movement can be manually wound with the crown in position 1. Rotate the crown clockwise to wind the mainspring.

The time is set with the crown in second position (pulled all the way out). Rotate the crown clockwise to advance the minute and hour hands and counter-clockwise to turn them backward.

STP1-11 Movements

ComplicationsHand-Winding
Calibre
Automatic
Calibre
StandardSTP1-11MSTP1-11
Swan Neck RegulatorSTP3-13
Outer Day-DateSTP4-13
Open HeartSTP5-15MSTP5-15
SkeletonizedSTP6-15
Images are taken from official publications and are used here for commentary and educational purposes. Copyright is held by the original owner as noted.
Manufacturer Link

Related Posts

ETA 2893-2

AS 5008

Chronoswiss C.125

Zenith 693

Chronoswiss C.124

Zenith 682