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You are here: Home / Movements / ST1901

ST1901

Last Update: May 26, 2022

Brand:Sea-Gull, Tianjin
Family:
Tianjin TY2900/ST19 Family
Height:6.25 mm
Jewels:19, 21, 22
Reserve: hours
Frequency:
Winding:Hand winding
Diameter:31.30 mm
  Complications:2-Button, Chronograph
Hands:30 Minute Chronograph Hand at 3:00, Central 60 Second Chronograph Hand, Central Hour Hand, Central Minute Hand, Hour Hand at 6:00, Small Seconds Hand at 9:00
Distinguishing Technical Characteristics
Hand-Winding
Clockwise Balance Cock
Balance
Balance at 1:30
Balance at 7:30
Column Wheel
Column Wheel at 6:00
Production:  – 
1910s 1920s 1930s 1940s 1950s 1960s 1970s 1980s 1990s 2000s 2010s 2020s

The Sea-Gull ST19 family is based on the design of the Venus 175 family, which was sold in the early 1960s to the Tianjin Watch Factory after it went out of production. Tianjin upgraded the 17-jewel Cal. 175 to 19 jewels, with the first prototype completed in 1963, a date that has become associated with the movement today. The first test batch was produced for “Project 304”, with an initial run of 1,400 watches delivered in 1966 to the Chinese Air Force.

When Tianjin Seagull Corporation was created in 1992, production of the movement was re-started, with commemorative “Sea-Gull” chronograph watches using the ST19 movement appearing in 2005. Since then, the ST19 family has been expanded and has found favor among budget-minded watch collectors worldwide.

Among the additions in the ST19 is a curious hour hand subdial at 6:00. Unlike most chronograph movements, which show the cumulative measured time on their hour register, this is simply a second timekeeping hour hand. It shows a 12 hour scale on Cal. ST1902 and more useful 24 hour scale on Cal. ST1903.

The ST19 family is also sold by Tianjin as the TY2900 family.

As of 2022, Cal. ST1901 retailed for US$139.

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

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