Seiko Cal. 4421 - 638

The 4421-638 is a sought-after Hand-Winding piece from Seiko's golden era. It features a Cream dial protected by a Hardlex crystal and offers 170m of water resistance. [seikata-wm-84634107c204]

Also known as: Bullhead, Bellmatic

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

37mm

Case Thickness

14.5mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

170m

Dial Color

Cream

Jewels

19j

Frequency

21,600 bph

Power Reserve

41 hours

Year

1982

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