Seiko Cal. 5638 - 412

The Seiko 5638-412 represents an important milestone in Seiko's 1968 lineup. With its 22mm lug width and 10.2mm profile, it sits comfortably on most wrists. [seikata-wm-9b3c8ff373a6]

Also known as: Monster, Sea Horse

Specifications

Movement

Solar

Case Material

Titanium

Case Width

46mm

Case Thickness

10.2mm

Lug Width

22mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

110m

Dial Color

Burgundy

Jewels

20j

Frequency

28,800 bph

Power Reserve

37 hours

Year

1968

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