Seiko Cal. 5644 - 308

The Seiko 5644-308 represents an important milestone in Seiko's 1974 lineup. With its 21mm lug width and 14.5mm profile, it sits comfortably on most wrists. [seikata-wm-3caced2bca98]

Also known as: Sumo, Helmet

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

34mm

Case Thickness

14.5mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

80m

Dial Color

Champagne

Jewels

32j

Frequency

36,000 bph

Power Reserve

62 hours

Year

1974

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