Seiko Cal. 5681 - 688

The Seiko 5681-688 represents an important milestone in Seiko's 1968 lineup. It features a Cream dial protected by a Hardlex crystal and offers 50m of water resistance. [seikata-wm-1a1dfae5c972]

Also known as: Bellmatic, Navigator

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

38mm

Case Thickness

9.2mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

50m

Dial Color

Cream

Jewels

18j

Frequency

21,600 bph

Power Reserve

59 hours

Year

1968

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