Seiko Cal. 5631 - 171

The Seiko 5631-171 represents an important milestone in Seiko's 1970 lineup. With its 18mm lug width and 14.6mm profile, it sits comfortably on most wrists. [seikata-wm-ff1e757b206a]

Also known as: Silverwave

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

45mm

Case Thickness

14.6mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

190m

Dial Color

Burgundy

Jewels

27j

Frequency

28,800 bph

Power Reserve

71 hours

Year

1970

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