Seiko Cal. 6691 - 921

The Seiko 6691-921 represents an important milestone in Seiko's 1988 lineup. With its 20mm lug width and 14.9mm profile, it sits comfortably on most wrists. [seikata-wm-b8bff36dfe33]

Also known as: Tuna, Golden Tuna

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

42mm

Case Thickness

14.9mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

120m

Dial Color

Burgundy

Jewels

30j

Frequency

28,800 bph

Power Reserve

37 hours

Year

1988

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