Seiko Cal. 4428 - 347

Seiko 4428-347

This Hand-Winding model from 1988 features a 35mm Hardlex-Coated Steel case. With its 20mm lug width and 9.9mm profile, it sits comfortably on most wrists. [seikata-wm-75e00f504e23]

Also known as: Helmet, Navigator

Specifications

Movement
Hand-Winding
Case Material
Hardlex-Coated Steel
Case Width
35mm
Case Thickness
9.9mm
Lug Width
20mm
Crystal
Acrylic
Bezel
Rotating
Water Resistance
30m
Dial Color
Champagne
Jewels
34j
Frequency
21,600 bph
Power Reserve
71 hours
Year
1988

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seikata-wm-75e00f504e23