Seagull Caliber TY2706

Manufacturer	Seagull
Caliber Number	TY-2706, TY2706, ST1701, ST17
Base Caliber	ST16
Movement Type	Automatic, self-winding mechanical
Lignes	11.5”’
Diameter	26mm
Height	4.65mm
Jewels	20
Beats per hour	21,600 vph, 3Hz
Power Reserve	> 36 hours
Anti-Shock System	Incabloc clone
Hand-Windable?	Yes
Functions	Central hours; central minutes; small seconds subdial at 6:00
Hacking Seconds?	No
Country of Manufacture	Made in China
Known Models	(Please add your watch in the comments below…)

The Seagull caliber TY2706 (aka ST1701) is an automatic movement with a small seconds subdial at 6:00.

The small seconds position on this calibre is made possible because of the placement of the fourth wheel. This layout is useful for modern day versions of vintage mechanical military watches or pocket watch style designs.

Tianjin and Seagull are the same company (Tianjin Seagull Watch Group), but they have offices in Tianjin, China as well as Hong Kong. Apparently the different caliber numbers correspond with where the movements ship out of.

You’ll notice no engravings or inscriptions on the movement or rotor. Not even a jewel count.

Additional Resources:

• Tianjin Seagull on Wikipedia