Seiko Cal. 5641 - 777

The Seiko 5641-777 represents an important milestone in Seiko's 1966 lineup. It features a Black dial protected by a Acrylic crystal and offers 110m of water resistance. [seikata-wm-d049ffddace3]

Also known as: Sumo

Specifications

Movement

Solar

Case Material

Titanium

Case Width

37mm

Case Thickness

14.3mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

110m

Dial Color

Black

Jewels

28j

Frequency

28,800 bph

Power Reserve

50 hours

Year

1966

Related Models

• Seiko 6195-412
• Seiko 6680-578
• Seiko 6628-332
• Seiko 5270-595
• Seiko 6339-118
• Seiko 4473-392
• Seiko 4486-131
• Seiko 3822-826
• Seiko 3855-380
• Seiko 6191-673
• Seiko 4582-853
• Seiko 6687-539