Seiko Cal. 4421 - 636

The Seiko 4421-636 represents an important milestone in Seiko's 1987 lineup. It features a Cream dial protected by a Acrylic crystal and offers 150m of water resistance. [seikata-wm-66113af1d960]

Also known as: Bullhead, Silverwave

Specifications

Movement

Solar

Case Material

Gold-Plated

Case Width

36mm

Case Thickness

9.7mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

150m

Dial Color

Cream

Jewels

36j

Frequency

21,600 bph

Power Reserve

42 hours

Year

1987

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