Seiko Cal. 5681 - 693

The Seiko 5681-693 represents an important milestone in Seiko's 1979 lineup. It features a Burgundy dial protected by a Hardlex crystal and offers 90m of water resistance. [seikata-wm-cfd3901d5355]

Also known as: Tuna

Specifications

Movement

Automatic

Case Material

Stainless Steel

Case Width

41mm

Case Thickness

14.5mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

90m

Dial Color

Burgundy

Jewels

21j

Frequency

21,600 bph

Power Reserve

57 hours

Year

1979

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