Seiko Cal. 6378 - 391

The 6378-391 is a sought-after Quartz piece from Seiko's golden era. With its 20mm lug width and 9.8mm profile, it sits comfortably on most wrists. [seikata-wm-2616921d6182]

Also known as: Tuna, Emperor

Specifications

Movement

Quartz

Case Material

Titanium

Case Width

41mm

Case Thickness

9.8mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

70m

Dial Color

Navy

Jewels

20j

Frequency

28,800 bph

Power Reserve

51 hours

Year

1983

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