Seiko Cal. 4421 - 331

The Seiko 4421-331 represents an important milestone in Seiko's 1999 lineup. It features a Black dial protected by a Mineral crystal and offers 160m of water resistance. [seikata-wm-e8a4ac624ff7]

Also known as: World Timer, Sea Horse

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

45mm

Case Thickness

8.8mm

Lug Width

18mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

160m

Dial Color

Black

Jewels

21j

Frequency

21,600 bph

Power Reserve

36 hours

Year

1999

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