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 / STP1-11M

STP1-11M

Last Update: June 13, 2019

Brand:STP
Family:
STP1-11 Family
Height:3.70 mm
Jewels:20
Reserve:44 hours
Frequency:28,800 A/h
Winding:Hand winding
Diameter:25.60 mm (11.5 ligne)
  Complications:Date, Hacking Seconds, Hand Winding, Quick Date Correction
Hands:Central Hour Hand, Central Minute Hand, Central Seconds Hand, Date Window at 3:00
Distinguishing Technical Characteristics
Hand-Winding
Clockwise Balance Cock
Screw Regulator
Production:  – 
1910s 1920s 1930s 1940s 1950s 1960s 1970s 1980s 1990s 2000s 2010s 2020s

STP1-11M is a hand-winding watch movement from Swiss Technology Production. It is a replacement for the ETA 2804-2 and uses the same wheel architecture. STP uses a longer, thinner mainspring, boosting power reserve to 44 hours. It also includes three extra jewels.

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.

Cal. STP1-11 is an automatic version.

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.

Related Posts

AS 5008

ETA 2893-2

Zenith 682

ETA 2893-1

Zenith 685

Zenith 693