Seiko Cal. 5638 - 628

The Seiko 5638-628 represents an important milestone in Seiko's 1970 lineup. With its 22mm lug width and 11.0mm profile, it sits comfortably on most wrists. [seikata-wm-357edb8ec3b9]

Also known as: Golden Tuna

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

44mm

Case Thickness

11.0mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

140m

Dial Color

Green

Jewels

29j

Frequency

21,600 bph

Power Reserve

56 hours

Year

1970

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