Seiko Cal. 6691 - 570

The Seiko 6691-570 represents an important milestone in Seiko's 1974 lineup. With its 18mm lug width and 8.7mm profile, it sits comfortably on most wrists. [seikata-wm-59dc2230e326]

Also known as: Tuna

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

42mm

Case Thickness

8.7mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

100m

Dial Color

Burgundy

Jewels

36j

Frequency

21,600 bph

Power Reserve

39 hours

Year

1974

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