Seiko Cal. 5641 - 900

The Seiko 5641-900 represents an important milestone in Seiko's 1982 lineup. With its 19mm lug width and 13.5mm profile, it sits comfortably on most wrists. [seikata-wm-52349e6ff30f]

Also known as: Golden Tuna

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

40mm

Case Thickness

13.5mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

140m

Dial Color

Blue Sunburst

Jewels

27j

Frequency

28,800 bph

Power Reserve

71 hours

Year

1982

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