Seiko Cal. 4478 - 642

The Seiko 4478-642 represents an important milestone in Seiko's 1966 lineup. Powered by the 4478 caliber with 17j jewels beating at 36,000 bph, it delivers a 71 hours power reserve. [seikata-wm-1bf6e4cf2811]

Also known as: Monster, Helmet

Specifications

Movement

Kinetic

Case Material

Two-Tone

Case Width

40mm

Case Thickness

9.1mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

110m

Dial Color

Navy

Jewels

17j

Frequency

36,000 bph

Power Reserve

71 hours

Year

1966

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