The ST1901 is a bi-compax manual-wind chronograph movement with column wheel. Based on the Swiss Venus 175, it was originally developed as the ST3 in 1961 for Chinese Air Force pilots under Project 304. Small seconds at 9 o'clock, 30-minute chronograph counter at 3 o'clock. This is Sea-Gull's most famous and widely used chronograph movement, found in the iconic Seagull 1963 pilot's watch.
Movement Type
Manual Wind
Jewel Count
21 jewels
Power Reserve
51h
Frequency
21,600 vph (6 Hz)
Diameter
31.3mm
Height
6.25mm
Display Type
Analog
Shock Protection
Incabloc
BRAND
Seagull Watch GroupTYPE
Manual WindSTATUS
In ProductionMANUFACTURE
ÉbaucheLAUNCH YEAR
2003CALIBER FAMILY
ST19COUNTRY
ChinaALSO KNOWN AS
