Seiko Cal. 4443 - 257

This Spring Drive model from 1977 features a 41mm PVD Black case. With its 20mm lug width and 12.1mm profile, it sits comfortably on most wrists. [seikata-wm-039c2df16ba0]

Also known as: Navigator, Emperor

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

41mm

Case Thickness

12.1mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

110m

Dial Color

Champagne

Jewels

17j

Frequency

21,600 bph

Power Reserve

43 hours

Year

1977

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