Seiko Cal. 6391 - 337

The Seiko 6391-337 represents an important milestone in Seiko's 1977 lineup. It features a White dial protected by a Hardlex crystal and offers 100m of water resistance. [seikata-wm-bba2b06d7e35]

Also known as: Sportsmatic

Specifications

Movement

Quartz

Case Material

Gold-Plated

Case Width

40mm

Case Thickness

13.5mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

100m

Dial Color

White

Jewels

17j

Frequency

36,000 bph

Power Reserve

40 hours

Year

1977

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