Seiko Cal. 6399 - 831

The Seiko 6399-831 represents an important milestone in Seiko's 1967 lineup. The Fixed bezel and 45mm case give it a distinctive presence on the wrist. [seikata-wm-53224aa28265]

Also known as: Sumo

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

45mm

Case Thickness

15.5mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

160m

Dial Color

Champagne

Jewels

20j

Frequency

36,000 bph

Power Reserve

63 hours

Year

1967

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