Seiko Cal. 6631 - 164

The Seiko 6631-164 represents an important milestone in Seiko's 1974 lineup. With its 21mm lug width and 15.1mm profile, it sits comfortably on most wrists. [seikata-wm-ea893e753f0a]

Also known as: Samurai

Specifications

Movement

Quartz

Case Material

PVD Black

Case Width

39mm

Case Thickness

15.1mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

170m

Dial Color

Black

Jewels

17j

Frequency

28,800 bph

Power Reserve

67 hours

Year

1974

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