Seiko Cal. 6660 - 631

This Quartz model from 1981 features a 42mm PVD Black case. The Bidirectional bezel and 42mm case give it a distinctive presence on the wrist. [seikata-wm-2169d5ad8011]

Also known as: Navigator

Specifications

Movement

Quartz

Case Material

PVD Black

Case Width

42mm

Case Thickness

15.4mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

30m

Dial Color

Green

Jewels

17j

Frequency

28,800 bph

Power Reserve

36 hours

Year

1981

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