Seiko Cal. 6331 - 578

This Spring Drive model from 1967 features a 36mm PVD Black case. With its 21mm lug width and 9.8mm profile, it sits comfortably on most wrists. [seikata-wm-3ac21a41ef37]

Also known as: Shogun

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

36mm

Case Thickness

9.8mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

180m

Dial Color

Navy

Jewels

26j

Frequency

28,800 bph

Power Reserve

49 hours

Year

1967

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