Seiko Cal. 6628 - 991

The Seiko 6628-991 represents an important milestone in Seiko's 1970 lineup. With its 21mm lug width and 8.7mm profile, it sits comfortably on most wrists. [seikata-wm-f7001396765a]

Also known as: Bullhead

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

34mm

Case Thickness

8.7mm

Lug Width

21mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

30m

Dial Color

Navy

Jewels

34j

Frequency

28,800 bph

Power Reserve

60 hours

Year

1970

Related Models

• Seiko 7168-972
• Seiko 3840-825
• Seiko 4540-661
• Seiko 4577-953
• Seiko 5235-704
• Seiko 6315-410
• Seiko 6278-618
• Seiko 7052-859
• Seiko 0758-662
• Seiko 6380-529
• Seiko 5650-154
• Seiko 5690-982