CHINA'S FIRST WRISTWATCH 60TH ANNIVERSARY

Brand: Sea-Gull (海鷗). Reference: 816.661. Mechanical, self-winding. Launch date: 2015-Month?-Date?

This watch marks the 60th year since the birth of China's first wristwatch in 1955.

Chinese character:
中国天津 - China Tianjin. Position: 6 o'clock on dial.
纪念中国第一只手表诞生60周年 - Commemorating the 60th anniversary of the birth of China’s first watch. Position: on case back.

MOVEMENT
Mechanical, self-winding. China Made. Caliber: Sea-Gull ST2130. Functions: Hour, minute, second, date. Quick date setting. Instant date change. Stop-seconds (hacking) to set time precisely. Jewels: 28. Frequency: 28800 vph. Power reserve: Around 42 hours.

CASE
Stainless steel. Diameter: 40 mm. Thickness: 12 mm. Lug width: 20 mm. Water resistance: 50 meters. Luminescence: No lume. Dial: Black. Crystal: Sapphire crystal. Case back: Screw-down dodecagon shaped. Not transparent. Stainless steel case back. Hands: Dauphine hour and minute hands. Crown: Push-pull. Fluted cylinder shape. Stainless steel crown. Signed with the Sea-Gull watch logo.

BRACELET
Silver color. Stainless steel links. No quick release: Need tool to remove strap from case. Fit for case lug width: 20 mm. Clasp: Butterfly clasp. Stainless steel clasp.