Seiko Cal. 4478 - 840

Released in 1970, the Cal. 4478 with design code 840 was part of Seiko's domestic market collection. With its 22mm lug width and 12.7mm profile, it sits comfortably on most wrists. [seikata-wm-753ff6da009a]

Also known as: Sumo

Specifications

Movement

Kinetic

Case Material

Titanium

Case Width

46mm

Case Thickness

12.7mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

100m

Dial Color

Burgundy

Jewels

32j

Frequency

21,600 bph

Power Reserve

59 hours

Year

1970

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