Seiko Cal. 6378 - 617

The Seiko 6378-617 represents an important milestone in Seiko's 1987 lineup. The Rotating bezel and 42mm case give it a distinctive presence on the wrist. [seikata-wm-a2a301e26973]

Also known as: Shogun, Helmet

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

42mm

Case Thickness

10.7mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

200m

Dial Color

Blue Sunburst

Jewels

29j

Frequency

21,600 bph

Power Reserve

40 hours

Year

1987

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