Seiko Cal. 5684 - 138

The Seiko 5684-138 represents an important milestone in Seiko's 1981 lineup. It features a Black dial protected by a Hardlex crystal and offers 140m of water resistance. [seikata-wm-adc32cb62ffa]

Also known as: Sportsmatic, Flighty

Specifications

Movement

Quartz

Case Material

PVD Black

Case Width

35mm

Case Thickness

10.6mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

140m

Dial Color

Black

Jewels

30j

Frequency

36,000 bph

Power Reserve

60 hours

Year

1981

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