GMT · DAY · DATE · 6157

Brand: Sea-Gull (海鷗). Reference: 819.37.6157. [Version: blue dial, leather strap. View other versions →]. Launch date: 2023-Month?-Date? Official retail price: CN ￥1,780

MOVEMENT
Mechanical, self-winding. China Made. Caliber: Sea-Gull ST2502. Functions: Hour, minute, second, date, day, dual time (Central hour, minute and seconds hands, turn the crown at 3 o'clock up/clockwise to manually wind, pull out, the seconds hands stops/hacks, then turn crown to adjust minute and hour hands. Day-of-the-week sub-dial at 9 o'clock controlled by hidden button at 8 o'clock on case side. Date sub-dial at 3 o'clock controlled by push button at 4 o'clock. Turn the button at 2 o'clock to rotate the charpter ring for GMT function.). Quick date setting. Stop-seconds (hacking) to set time precisely. Jewels: 29. Frequency: 21600 vph. Power reserve: Around 40 hours.

CASE
316L stainless steel. Diameter: 41 mm. Thickness: 14 mm. Lug width: 20 mm. Water resistance: 5 ATM. Luminescence: Green luminescence on hour hand, minute hand, numerals and hour markers. Dial: Blue. Sunburst pattern. Applied numerals and hour markers. Crystal: Sapphire crystal. Has anti-reflective coating. Case back: Screw-down notched. Transparent. Crown: Push-pull. Signed with the "S" logo.

STRAP
Blue. Leather. No quick release: Need tool to remove strap from case. Fit for case lug width: 20 mm. Clasp: Pin buckle. Stainless steel clasp.