Seiko Cal. 5631 - 528

The Seiko 5631-528 represents an important milestone in Seiko's 1976 lineup. The Rotating bezel and 39mm case give it a distinctive presence on the wrist. [seikata-wm-a51e15ab6d00]

Also known as: Panda, Sportsmatic

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

39mm

Case Thickness

15.8mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

160m

Dial Color

Cream

Jewels

36j

Frequency

36,000 bph

Power Reserve

48 hours

Year

1976

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