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You are here: Home / Families / STP1-11 Family

STP1-11 Family

Last Update: June 13, 2019

BRANDS: STP

Production: 2008 – Current
1910s 1920s 1930s 1940s 1950s 1960s 1970s 1980s 1990s 2000s 2010s 2020s
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STP1-11 is the basis for an automatic watch movement family from Swiss Technology Production, with volume production beginning in 2012. It is a replacement for the popular ETA 2800 family and uses the same wheel architecture. STP uses a longer, thinner mainspring, boosting power reserve to 44 hours. It also includes an extra jewel on the barrel arbor.

The production line was expanded in 2012, beginning volume production of Cal. STP1-11, and was automated in 2015 for further production and quality. Complicated movements with a power reserve indicator built on this base, known as Cal. STP2-12, were introduced in 2015. The open heart Cal. STP5-15 and skeletonized Cal. STP6-15 were added in 2016. The smaller Cal. STP8-14 was added in 2016 and the larger Cal. STP4-13 in 2017. 2019 saw a range of variations on the existing STP2-12 calibres.

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.

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

STP also builds modular movements on the STP1-11 base. These movements, known as STP2-12, eliminate the central seconds hand and include calendar complications, power reserve indicator, and even a regulator layout.

  • STP2-12-1: Retrograde Power Reserve Indicator, Small Seconds, Date Subdial
    • STP2-12-11: Retrograde Power Reserve Indicator
    • STP2-12-12: Small Seconds
    • STP2-12-13: Retrograde Power Reserve Indicator, Small Seconds
  • STP2-12-3: Date by Pointer, Day Subdial, Retrograde Power Reserve Indicator, Small Seconds
    • STP2-12-31: Date by Pointer
    • STP2-12-32: Date by Pointer, Small Seconds
    • STP2-12-33: Date by Pointer, Retrograde Power Reserve Indicator, Small Seconds
  • STP2-12-6: Moon Phase Wheel and Day Subdial, Retrograde Power Reserve Indicator, Small Seconds, Date Subdial
    • STP2-12-61: Moon Phase Wheel, Date Subdial
    • STP2-12-62: Moon Phase Wheel, Small Seconds
    • STP2-12-63: Moon Phase Wheel, Retrograde Power Reserve Indicator, Small Seconds
  • STP2-12-7: Regulator with Central Minutes, Small Seconds, Hour Subdial, Retrograde Power Reserve Indicator
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Calibre Start Year End Year Jewels Diameter (mm) Height (mm) Complications
STP1-11 2008 Current 26 25.60 4.60 Date, Hacking Seconds, Hand Winding, Quick Date Correction
STP1-11M 20 25.60 3.70 Date, Hacking Seconds, Hand Winding, Quick Date Correction
STP3-13 2016 Current 26 25.60 4.60 Date, Hacking Seconds, Hand Winding, Quick Date Correction
STP4-13 2017 Current 26 29.00 5.15 Date, Day, Hacking Seconds, Hand Winding, Outer Day Wheel, Quick Date Correction, Quick Day Correction
STP5-15 2016 Current 26 25.60 4.60 Hacking Seconds, Hand Winding
STP5-15M 20 25.60 3.70 Hacking Seconds, Hand Winding
STP6-15 2016 Current 26 25.60 4.60 Hacking Seconds, Hand Winding

STP1-11

STP1-11M

STP3-13

STP4-13

STP5-15

STP5-15M

STP6-15

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