Seiko Cal. 4428 - 670

This Spring Drive model from 1967 features a 42mm Two-Tone case. With its 22mm lug width and 12.6mm profile, it sits comfortably on most wrists. [seikata-wm-27f3fc5fd9ce]

Also known as: Bellmatic, Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

42mm

Case Thickness

12.6mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

140m

Dial Color

Champagne

Jewels

26j

Frequency

28,800 bph

Power Reserve

52 hours

Year

1967

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