Seiko Cal. 5690 - 131

The Seiko 5690-131 represents an important milestone in Seiko's 1978 lineup. It features a Black dial protected by a Acrylic crystal and offers 150m of water resistance. [seikata-wm-93fea603fcbe]

Also known as: Bullhead

Specifications

Movement

Kinetic

Case Material

Titanium

Case Width

41mm

Case Thickness

10.4mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

150m

Dial Color

Black

Jewels

30j

Frequency

28,800 bph

Power Reserve

51 hours

Year

1978

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