Seiko Cal. 5631 - 363

The Seiko 5631-363 represents an important milestone in Seiko's 1972 lineup. With its 22mm lug width and 9.7mm profile, it sits comfortably on most wrists. [seikata-wm-591c49d1cdf2]

Also known as: Panda, Sea Horse

Specifications

Movement

Kinetic

Case Material

Two-Tone

Case Width

40mm

Case Thickness

9.7mm

Lug Width

22mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

120m

Dial Color

White

Jewels

36j

Frequency

21,600 bph

Power Reserve

70 hours

Year

1972

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