Seiko Cal. 5631 - 465

The Seiko 5631-465 represents an important milestone in Seiko's 1971 lineup. It features a White dial protected by a Sapphire crystal and offers 110m of water resistance. [seikata-wm-edf1e8e80ce7]

Also known as: Tuna, World Timer

Specifications

Movement

Kinetic

Case Material

Titanium

Case Width

44mm

Case Thickness

10.0mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

110m

Dial Color

White

Jewels

33j

Frequency

21,600 bph

Power Reserve

62 hours

Year

1971

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