Seiko Cal. 5691 - 764

The Seiko 5691-764 represents an important milestone in Seiko's 1979 lineup. With its 21mm lug width and 11.0mm profile, it sits comfortably on most wrists. [seikata-wm-3d49620bfc57]

Also known as: Bullhead, Arnie

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

45mm

Case Thickness

11.0mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

150m

Dial Color

Silver

Jewels

22j

Frequency

21,600 bph

Power Reserve

47 hours

Year

1979

Related Models

• Seiko 7040-629
• Seiko 6156-536
• Seiko 7193-223
• Seiko 5639-277
• Seiko 3814-638
• Seiko 6118-472
• Seiko 0757-424
• Seiko 6636-130
• Seiko 3810-997
• Seiko 3836-201
• Seiko 5649-156
• Seiko 6190-551