Seiko Cal. 6643 - 367

The Seiko 6643-367 represents an important milestone in Seiko's 1977 lineup. With its 18mm lug width and 8.9mm profile, it sits comfortably on most wrists. [seikata-wm-b440946d4777]

Also known as: Emperor

Specifications

Movement

Quartz

Case Material

Titanium

Case Width

34mm

Case Thickness

8.9mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

150m

Dial Color

Cream

Jewels

33j

Frequency

36,000 bph

Power Reserve

41 hours

Year

1977

Related Models

• Seiko 3894-396
• Seiko 7157-143
• Seiko 5291-977
• Seiko 4460-251
• Seiko 3854-247
• Seiko 4556-710
• Seiko 5213-507
• Seiko 6667-373
• Seiko 5678-967
• Seiko 6180-951
• Seiko 0796-158
• Seiko 6172-245