Seiko Cal. 5661 - 799

This Spring Drive model from 1977 features a 46mm Titanium case. It features a Black dial protected by a Hardlex crystal and offers 70m of water resistance. [seikata-wm-147f0f88ff34]

Also known as: Helmet

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

46mm

Case Thickness

12.4mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

70m

Dial Color

Black

Jewels

22j

Frequency

28,800 bph

Power Reserve

70 hours

Year

1977

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