Seiko Cal. 4556 - 724

This Automatic model from 1971 features a 40mm PVD Black case. With its 21mm lug width and 12.8mm profile, it sits comfortably on most wrists. [seikata-wm-12d165b49902]

Also known as: Helmet, Emperor

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

40mm

Case Thickness

12.8mm

Lug Width

21mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

170m

Dial Color

Navy

Jewels

36j

Frequency

36,000 bph

Power Reserve

71 hours

Year

1971

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