Seiko Cal. 4421 - 631

The Seiko 4421-631 represents an important milestone in Seiko's 1992 lineup. Powered by the 4421 caliber with 30j jewels beating at 28,800 bph, it delivers a 62 hours power reserve. [seikata-wm-a3cc3cf63f0c]

Also known as: Sportsmatic

Specifications

Movement

Quartz

Case Material

Gold-Plated

Case Width

38mm

Case Thickness

14.3mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

130m

Dial Color

Black

Jewels

30j

Frequency

28,800 bph

Power Reserve

62 hours

Year

1992

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