Seiko Cal. 5631 - 823

The Seiko 5631-823 represents an important milestone in Seiko's 1965 lineup. It features a White dial protected by a Mineral crystal and offers 60m of water resistance. [seikata-wm-7ea22c3f6534]

Also known as: Helmet

Specifications

Movement

Kinetic

Case Material

Titanium

Case Width

38mm

Case Thickness

8.3mm

Lug Width

18mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

60m

Dial Color

White

Jewels

36j

Frequency

28,800 bph

Power Reserve

52 hours

Year

1965

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