Seiko Cal. 5631 - 180

The Seiko 5631-180 represents an important milestone in Seiko's 1967 lineup. It features a Champagne dial protected by a Sapphire crystal and offers 140m of water resistance. [seikata-wm-90fc73f6da82]

Also known as: Monster, Sportsmatic

Specifications

Movement

Kinetic

Case Material

Hardlex-Coated Steel

Case Width

42mm

Case Thickness

10.6mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

140m

Dial Color

Champagne

Jewels

19j

Frequency

28,800 bph

Power Reserve

72 hours

Year

1967

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