Seiko Cal. 6390 - 840

This Spring Drive model from 1990 features a 42mm Hardlex-Coated Steel case. With its 20mm lug width and 15.3mm profile, it sits comfortably on most wrists. [seikata-wm-89a96d415723]

Also known as: Navigator, Crown

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

42mm

Case Thickness

15.3mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

60m

Dial Color

Navy

Jewels

30j

Frequency

21,600 bph

Power Reserve

40 hours

Year

1990

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