Seiko Cal. 6631 - 283

This Quartz model from 1981 features a 40mm PVD Black case. It features a Silver dial protected by a Mineral crystal and offers 120m of water resistance. [seikata-wm-470249acb399]

Also known as: Navigator, Crown

Specifications

Movement

Quartz

Case Material

PVD Black

Case Width

40mm

Case Thickness

14.8mm

Lug Width

20mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

120m

Dial Color

Silver

Jewels

32j

Frequency

36,000 bph

Power Reserve

68 hours

Year

1981

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