Seiko Cal. 4431 - 447

Seiko 4431-447

This Automatic model from 1980 features a 38mm PVD Black case. With its 21mm lug width and 13.1mm profile, it sits comfortably on most wrists. [seikata-wm-cb36736930a4]

Also known as: Helmet, Sportsmatic

Specifications

Movement
Automatic
Case Material
PVD Black
Case Width
38mm
Case Thickness
13.1mm
Lug Width
21mm
Crystal
Mineral
Bezel
Inner Rotating
Water Resistance
40m
Dial Color
White
Jewels
32j
Frequency
28,800 bph
Power Reserve
63 hours
Year
1980

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seikata-wm-cb36736930a4