Seiko Cal. 5631 - 438

The Seiko 5631-438 represents an important milestone in Seiko's 1984 lineup. It features a Burgundy dial protected by a Mineral crystal and offers 40m of water resistance. [seikata-wm-786f9f74f27d]

Also known as: World Timer

Specifications

Movement

Kinetic

Case Material

Stainless Steel

Case Width

34mm

Case Thickness

15.5mm

Lug Width

19mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

40m

Dial Color

Burgundy

Jewels

30j

Frequency

21,600 bph

Power Reserve

39 hours

Year

1984

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