Seiko Cal. 6131 - 581

The Seiko 6131-581 represents an important milestone in Seiko's 1968 lineup. The Bidirectional bezel and 35mm case give it a distinctive presence on the wrist. [seikata-wm-de0bf41933af]

Also known as: Helmet

Specifications

Movement

Kinetic

Case Material

Gold-Plated

Case Width

35mm

Case Thickness

14.0mm

Lug Width

22mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

60m

Dial Color

Black

Jewels

28j

Frequency

28,800 bph

Power Reserve

58 hours

Year

1968

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