Seiko Cal. 4478 - 431

The Seiko 4478-431 represents an important milestone in Seiko's 1998 lineup. With its 22mm lug width and 10.8mm profile, it sits comfortably on most wrists. [seikata-wm-f4e84bfea4e9]

Also known as: Helmet, Emperor

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

34mm

Case Thickness

10.8mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

180m

Dial Color

Black

Jewels

26j

Frequency

21,600 bph

Power Reserve

67 hours

Year

1998

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