Seiko Cal. 3860 - 657

The Seiko 3860-657 represents an important milestone in Seiko's 1976 lineup. The Bidirectional bezel and 37mm case give it a distinctive presence on the wrist. [seikata-wm-2603d91e66c1]

Also known as: Samurai, UFO

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

37mm

Case Thickness

13.8mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

30m

Dial Color

Silver

Jewels

28j

Frequency

36,000 bph

Power Reserve

51 hours

Year

1976

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