Seiko Cal. 4478 - 381

The Seiko 4478-381 represents an important milestone in Seiko's 1974 lineup. Powered by the 4478 caliber with 23j jewels beating at 36,000 bph, it delivers a 52 hours power reserve. [seikata-wm-9cc28b6ed52e]

Also known as: Tuna, World Timer

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

43mm

Case Thickness

9.9mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

120m

Dial Color

Burgundy

Jewels

23j

Frequency

36,000 bph

Power Reserve

52 hours

Year

1974

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