Seiko Cal. 6631 - 634

This Quartz model from 1978 features a 36mm Gold-Plated case. The Inner Rotating bezel and 36mm case give it a distinctive presence on the wrist. [seikata-wm-2753e0626bf1]

Also known as: Silverwave, Bellmatic

Specifications

Movement

Quartz

Case Material

Gold-Plated

Case Width

36mm

Case Thickness

11.2mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

50m

Dial Color

Black

Jewels

22j

Frequency

21,600 bph

Power Reserve

54 hours

Year

1978

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