Seiko Cal. 6631 - 203

This Quartz model from 1972 features a 44mm PVD Black case. It features a White dial protected by a Acrylic crystal and offers 60m of water resistance. [seikata-wm-b91415143ee8]

Also known as: Bullhead

Specifications

Movement

Quartz

Case Material

PVD Black

Case Width

44mm

Case Thickness

11.5mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

60m

Dial Color

White

Jewels

21j

Frequency

28,800 bph

Power Reserve

55 hours

Year

1972

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