Seiko Cal. 3864 - 577

The Seiko 3864-577 represents an important milestone in Seiko's 1980 lineup. The Bidirectional bezel and 42mm case give it a distinctive presence on the wrist. [seikata-wm-b278d396a1db]

Also known as: Helmet

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

42mm

Case Thickness

13.6mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

30m

Dial Color

Champagne

Jewels

19j

Frequency

21,600 bph

Power Reserve

36 hours

Year

1980

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