Seiko Cal. 0731 - 577

The Seiko 0731-577 represents an important milestone in Seiko's 1968 lineup. The Bidirectional bezel and 45mm case give it a distinctive presence on the wrist. [seikata-wm-70e1916d2960]

Also known as: Helmet, Rally

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

45mm

Case Thickness

14.6mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

180m

Dial Color

Green

Jewels

19j

Frequency

21,600 bph

Power Reserve

52 hours

Year

1968

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