Seagull Caliber TY2809

Manufacturer	Seagull
Caliber Number	TY-2809, TY2809, ST1601K3
Movement Type	Automatic, self-winding mechanical
Diameter	31mm
Height	5.18mm thick
Jewels	21
Beats per hour	21,600 vph
Power Reserve	36 hours
Anti-Shock System	Incabloc
Hand-Windable?	Yes
Hacking Seconds?	Yes
Functions	Central hours; central minutes; central sweeping seconds
Features	Skeleton dial
Country of Manufacture	Made in China
Known Models	Android Bioluminesence SD660 (Please add your watch in the comments below…)

The Seagull caliber TY2809 is an affordable skeleton dial automatic watch movement. It is a 3-hander with 21 jewels, made in China.

There are minimal markings on this caliber. No branding is found, but there is a country of origin and jewel count laser etched on the far outside of the rotor. AAA is also laser etched there.