Seiko Cal. 6391 - 186

The Seiko 6391-186 represents an important milestone in Seiko's 1984 lineup. It features a Silver dial protected by a Hardlex crystal and offers 30m of water resistance. [seikata-wm-c66c60f309ec]

Also known as: Helmet, World Timer

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

36mm

Case Thickness

10.4mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

30m

Dial Color

Silver

Jewels

19j

Frequency

21,600 bph

Power Reserve

44 hours

Year

1984

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