Seiko Cal. 4478 - 256

The Seiko 4478-256 represents an important milestone in Seiko's 1979 lineup. Powered by the 4478 caliber with 33j jewels beating at 28,800 bph, it delivers a 45 hours power reserve. [seikata-wm-87cbe7c19f75]

Also known as: Helmet, World Timer

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

39mm

Case Thickness

10.4mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

180m

Dial Color

Navy

Jewels

33j

Frequency

28,800 bph

Power Reserve

45 hours

Year

1979

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