Seiko Cal. 4421 - 646

The Seiko 4421-646 represents an important milestone in Seiko's 1987 lineup. It features a Green dial protected by a Hardlex crystal and offers 100m of water resistance. [seikata-wm-8e3b64084b08]

Also known as: Monster, Pogue

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

35mm

Case Thickness

11.5mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

100m

Dial Color

Green

Jewels

31j

Frequency

28,800 bph

Power Reserve

56 hours

Year

1987

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