Seiko Cal. 4428 - 640

The Seiko 4428-640 represents an important milestone in Seiko's 1991 lineup. With its 21mm lug width and 12.4mm profile, it sits comfortably on most wrists. [seikata-wm-963852caa30b]

Also known as: Pogue, Baby Tuna

Specifications

Movement

Quartz

Case Material

Two-Tone

Case Width

44mm

Case Thickness

12.4mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

40m

Dial Color

Cream

Jewels

18j

Frequency

36,000 bph

Power Reserve

42 hours

Year

1991

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