Seiko Cal. 5686 - 638

The Seiko 5686-638 represents an important milestone in Seiko's 1970 lineup. The Bidirectional bezel and 35mm case give it a distinctive presence on the wrist. [seikata-wm-789621b07a83]

Also known as: World Timer

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

35mm

Case Thickness

9.8mm

Lug Width

18mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

170m

Dial Color

Black

Jewels

34j

Frequency

36,000 bph

Power Reserve

72 hours

Year

1970

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