Seiko Cal. 4581 - 970

The Seiko 4581-970 represents an important milestone in Seiko's 1977 lineup. The Inner Rotating bezel and 43mm case give it a distinctive presence on the wrist. [seikata-wm-722c8a067208]

Also known as: Helmet

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

43mm

Case Thickness

10.7mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

140m

Dial Color

Navy

Jewels

18j

Frequency

21,600 bph

Power Reserve

61 hours

Year

1977

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