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FLYWHEEL · M172S
Brand: Sea-Gull (海鷗). Reference: M172S. [Version: sector subdials, date and power reserve indicator].
The rotating part at 6 o'clock looks like tourbillon but it's not. Retrograde date hand at 10 o'clock, power reserve indicator at 2 o'clock.
MOVEMENT
Mechanical, self-winding. China Made. Caliber: Sea-Gull ST2505. Functions: Hour, minute, second, date, power reserve indicator (Central hour, minute and seconds hands, date hand at 10 o'clock, power reserve indicator at 2 o'clock.). Frequency: 21600 vph.
CASE
316L stainless steel. Diameter: 40 mm. Thickness: 14 mm. Lug width: 21 mm. Water resistance: 50 meters. Weight: 95 grams (the whole watch including strap). Luminescence: No lume. Crystal: Sapphire crystal. Case back: Screw-down notched. Transparent. Hands: Thermal-bluing steel. Regrograde date hand. Crown: Push-pull. Pumpkin shape. Signed with the "S" logo.
STRAP
Black. Leather. No quick release: Need tool to remove strap from case. Fit for case lug width: 21 mm. Clasp: Butterfly clasp. Stainless steel clasp.
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