Seiko Cal. 6399 - 731

The Seiko 6399-731 represents an important milestone in Seiko's 1987 lineup. With its 21mm lug width and 13.0mm profile, it sits comfortably on most wrists. [seikata-wm-d11cf57afe40]

Also known as: Emperor

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

45mm

Case Thickness

13.0mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

80m

Dial Color

Black

Jewels

17j

Frequency

36,000 bph

Power Reserve

72 hours

Year

1987

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