Seiko Cal. 5638 - 106

The Seiko 5638-106 represents an important milestone in Seiko's 1973 lineup. With its 21mm lug width and 9.9mm profile, it sits comfortably on most wrists. [seikata-wm-b8f2a25081da]

Also known as: Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

42mm

Case Thickness

9.9mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

110m

Dial Color

Cream

Jewels

35j

Frequency

28,800 bph

Power Reserve

72 hours

Year

1973

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