Seiko Cal. 3864 - 642

The Seiko 3864-642 represents an important milestone in Seiko's 1989 lineup. With its 20mm lug width and 15.4mm profile, it sits comfortably on most wrists. [seikata-wm-53dbc0e848cf]

Also known as: World Timer, Baby Tuna

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

34mm

Case Thickness

15.4mm

Lug Width

20mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

130m

Dial Color

Cream

Jewels

34j

Frequency

21,600 bph

Power Reserve

55 hours

Year

1989

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