ST1701 Movement

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The Sea-Gull ST1701 (also known as TY2706) is a reliable, Chinese-made automatic mechanical watch movement featuring a sub-dial for small seconds at the 6 o'clock position. [1, 2, 3, 4]

Key Technical Specifications

Manufacturer: Tianjin Sea-Gull [1]
Type: Automatic with manual hand-winding [1]
Jewels: 20 jewels [1, 2]
Frequency: 21,600 vibrations per hour (3 Hz) [1, 2]
Power Reserve: Approximately 36 to 40 hours [1, 2]
Diameter: 26.00 mm (outer) / 25.60 mm (fitting) [1]
Thickness: ~4.50 mm [1]
Complications: Small second sub-dial at 6 o'clock; no date display [1, 2]

Pros and Cons

No Hacking: The second hand does not stop when you pull out the crown to set the time.
No Ghost Date: Because it lacks a calendar function, the single-position crown directly adjusts the time without any empty date-setting clicks.
Reliability: Part of the broader Sea-Gull ST17 family (derived from the ST16/Miyota-inspired


architecture), users and watchmakers generally regard it as a dependable, robust workhorse movement often found in affordable military-style or vintage field watches (such as Baltany and Militado)

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