Seiko Cal. 5640 - 401

The Seiko 5640-401 represents an important milestone in Seiko's 1996 lineup. With its 19mm lug width and 10.6mm profile, it sits comfortably on most wrists. [seikata-wm-6618dd7f3211]

Also known as: Sportsmatic

Specifications

Movement

Quartz

Case Material

Two-Tone

Case Width

38mm

Case Thickness

10.6mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

80m

Dial Color

Black

Jewels

36j

Frequency

28,800 bph

Power Reserve

61 hours

Year

1996

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