Seiko Cal. 5690 - 377

This Spring Drive model from 1965 features a 35mm Hardlex-Coated Steel case. It features a Cream dial protected by a Acrylic crystal and offers 160m of water resistance. [seikata-wm-9cef65992b25]

Also known as: Helmet, Navigator

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

35mm

Case Thickness

8.4mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

160m

Dial Color

Cream

Jewels

19j

Frequency

28,800 bph

Power Reserve

43 hours

Year

1965

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