Seiko Cal. 5631 - 450

This Spring Drive model from 1986 features a 46mm PVD Black case. With its 22mm lug width and 15.3mm profile, it sits comfortably on most wrists. [seikata-wm-68c842ae4d3d]

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

46mm

Case Thickness

15.3mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

110m

Dial Color

Champagne

Jewels

29j

Frequency

28,800 bph

Power Reserve

68 hours

Year

1986

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