Seiko Cal. 5644 - 678

The Seiko 5644-678 represents an important milestone in Seiko's 1978 lineup. With its 19mm lug width and 11.0mm profile, it sits comfortably on most wrists. [seikata-wm-81babba2ae2d]

Also known as: Samurai, Sportsmatic

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

44mm

Case Thickness

11.0mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

160m

Dial Color

Champagne

Jewels

27j

Frequency

28,800 bph

Power Reserve

60 hours

Year

1978

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