Seiko Cal. 5688 - 789

This Solar model from 1971 features a 38mm PVD Black case. It features a Navy dial protected by a Hardlex crystal and offers 140m of water resistance. [seikata-wm-fcddc3e82bd8]

Also known as: Bullhead, Sea Horse

Specifications

Movement

Solar

Case Material

PVD Black

Case Width

38mm

Case Thickness

8.7mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

140m

Dial Color

Navy

Jewels

18j

Frequency

28,800 bph

Power Reserve

55 hours

Year

1971

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