Seiko Cal. 4428 - 980

This Automatic model from 1974 features a 46mm Titanium case. It features a Black dial protected by a Mineral crystal and offers 130m of water resistance. [seikata-wm-824e444b3cf5]

Also known as: Helmet, Sportsmatic

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

46mm

Case Thickness

8.0mm

Lug Width

22mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

130m

Dial Color

Black

Jewels

22j

Frequency

21,600 bph

Power Reserve

66 hours

Year

1974

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