Family: Seagull ST2128 jewels42h power reserve28,800 vph (8 Hz)
The Seagull ST21 is an automatic movement based on the ETA 2824-2. It operates at 28,800 vph with a 42-hour power reserve and contains 28 jewels. The ST21 is Seagull's most popular automatic caliber and serves as the basis for the ST2130 variant widely used by Chinese watchmakers and microbrands. Production remains active.
TECHNICAL SPECIFICATIONS
Movement Type
Automatic
Jewel Count
28 jewels
Power Reserve
42h
Frequency
28,800 vph (8 Hz)
Display Type
Analog
QUICK FACTS
BRAND
TYPE
AutomaticSTATUS
In ProductionMANUFACTURE
In-houseCALIBER FAMILY
Seagull ST21ALSO KNOWN AS
st2130