Seiko Cal. 5631 - 518

The Seiko 5631-518 represents an important milestone in Seiko's 1981 lineup. It features a White dial protected by a Acrylic crystal and offers 110m of water resistance. [seikata-wm-2e19dc9d8f58]

Also known as: Bullhead

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

35mm

Case Thickness

11.7mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

110m

Dial Color

White

Jewels

30j

Frequency

21,600 bph

Power Reserve

56 hours

Year

1981

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