Seiko Cal. 5631 - 603

The Seiko 5631-603 represents an important milestone in Seiko's 1985 lineup. Powered by the 5631 caliber with 22j jewels beating at 28,800 bph, it delivers a 71 hours power reserve. [seikata-wm-ccef4a12825e]

Also known as: Monster, Goldfeather

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

40mm

Case Thickness

11.7mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

140m

Dial Color

Burgundy

Jewels

22j

Frequency

28,800 bph

Power Reserve

71 hours

Year

1985

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