Seiko Cal. 5631 - 812

The Seiko 5631-812 represents an important milestone in Seiko's 1984 lineup. It features a Cream dial protected by a Sapphire crystal and offers 110m of water resistance. [seikata-wm-4582478b9e1f]

Also known as: World Timer, Baby Tuna

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

8.5mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

110m

Dial Color

Cream

Jewels

22j

Frequency

36,000 bph

Power Reserve

41 hours

Year

1984

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