Seiko Cal. 6631 - 554

The Seiko 6631-554 represents an important milestone in Seiko's 1999 lineup. It features a Cream dial protected by a Hardlex crystal and offers 60m of water resistance. [seikata-wm-9f257af4b233]

Also known as: Sportsmatic

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

42mm

Case Thickness

8.8mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

60m

Dial Color

Cream

Jewels

33j

Frequency

21,600 bph

Power Reserve

49 hours

Year

1999

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