Seiko Cal. 6631 - 280

This Hand-Winding model from 1967 features a 41mm Titanium case. It features a Black dial protected by a Mineral crystal and offers 100m of water resistance. [seikata-wm-fa8276c35e21]

Also known as: Samurai, Sea Horse

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

41mm

Case Thickness

8.3mm

Lug Width

22mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

100m

Dial Color

Black

Jewels

36j

Frequency

28,800 bph

Power Reserve

64 hours

Year

1967

Related Models

• Seiko 5286-253
• Seiko 7133-923
• Seiko 6376-729
• Seiko 4448-583
• Seiko 6385-927
• Seiko 5624-383
• Seiko 5255-741
• Seiko 5626-614
• Seiko 4476-878
• Seiko 3812-425
• Seiko 6367-302
• Seiko 0740-854