Seiko Cal. 6381 - 820

The Seiko 6381-820 represents an important milestone in Seiko's 1984 lineup. The Coin-Edge bezel and 41mm case give it a distinctive presence on the wrist. [seikata-wm-eb1b6129e4b2]

Also known as: Helmet, Navigator

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

41mm

Case Thickness

14.1mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

190m

Dial Color

Blue Sunburst

Jewels

24j

Frequency

21,600 bph

Power Reserve

53 hours

Year

1984

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