Seiko Cal. 4556 - 978

The Seiko 4556-978 represents an important milestone in Seiko's 1966 lineup. With its 20mm lug width and 14.5mm profile, it sits comfortably on most wrists. [seikata-wm-cf0fa58a39bf]

Also known as: Silverwave, Emperor

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

37mm

Case Thickness

14.5mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

110m

Dial Color

Cream

Jewels

36j

Frequency

21,600 bph

Power Reserve

63 hours

Year

1966

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