Seiko Cal. 6378 - 396

The Seiko 6378-396 represents an important milestone in Seiko's 1999 lineup. With its 19mm lug width and 11.7mm profile, it sits comfortably on most wrists. [seikata-wm-bbcee7ab9fc1]

Also known as: Tuna, Helmet

Specifications

Movement

Solar

Case Material

Hardlex-Coated Steel

Case Width

41mm

Case Thickness

11.7mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

200m

Dial Color

Blue Sunburst

Jewels

26j

Frequency

36,000 bph

Power Reserve

46 hours

Year

1999

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