Seiko Cal. 6331 - 978

The Seiko 6331-978 represents an important milestone in Seiko's 1977 lineup. With its 22mm lug width and 10.8mm profile, it sits comfortably on most wrists. [seikata-wm-448865c00220]

Also known as: UFO

Specifications

Movement

Quartz

Case Material

Two-Tone

Case Width

36mm

Case Thickness

10.8mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

160m

Dial Color

White

Jewels

19j

Frequency

36,000 bph

Power Reserve

66 hours

Year

1977

Related Models

• Seiko 6225-517
• Seiko 5220-227
• Seiko 6122-819
• Seiko 6193-469
• Seiko 6212-556
• Seiko 4573-547
• Seiko 5630-297
• Seiko 6288-781
• Seiko 6226-175
• Seiko 5670-308
• Seiko 5689-436
• Seiko 4538-244