Seiko Cal. 6677 - 839

The Seiko 6677-839 represents an important milestone in Seiko's 1983 lineup. The Bidirectional bezel and 42mm case give it a distinctive presence on the wrist. [seikata-wm-56a81cf0702d]

Also known as: Helmet

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

42mm

Case Thickness

13.7mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

90m

Dial Color

Blue Sunburst

Jewels

34j

Frequency

21,600 bph

Power Reserve

50 hours

Year

1983

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