Seiko Cal. 4428 - 233

The Seiko 4428-233 represents an important milestone in Seiko's 1981 lineup. It features a White dial protected by a Hardlex crystal and offers 30m of water resistance. [seikata-wm-48e44df174d6]

Also known as: Bullhead

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

40mm

Case Thickness

14.7mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

30m

Dial Color

White

Jewels

35j

Frequency

21,600 bph

Power Reserve

37 hours

Year

1981

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