Seiko Cal. 6631 - 713

This Quartz model from 1981 features a 42mm Two-Tone case. With its 18mm lug width and 13.4mm profile, it sits comfortably on most wrists. [seikata-wm-b7f691a78cd5]

Specifications

Movement

Quartz

Case Material

Two-Tone

Case Width

42mm

Case Thickness

13.4mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

150m

Dial Color

Silver

Jewels

32j

Frequency

21,600 bph

Power Reserve

55 hours

Year

1981

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