Seiko Cal. 4557 - 381

The Seiko 4557-381 represents an important milestone in Seiko's 1977 lineup. The Fixed bezel and 36mm case give it a distinctive presence on the wrist. [seikata-wm-ad86a5257d4d]

Also known as: Helmet

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

36mm

Case Thickness

10.4mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

120m

Dial Color

Cream

Jewels

27j

Frequency

28,800 bph

Power Reserve

48 hours

Year

1977

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