Seiko Cal. 4478 - 645

The Seiko 4478-645 represents an important milestone in Seiko's 1971 lineup. Powered by the 4478 caliber with 30j jewels beating at 28,800 bph, it delivers a 60 hours power reserve. [seikata-wm-4c9769b902fc]

Also known as: Silverwave, Emperor

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

34mm

Case Thickness

9.1mm

Lug Width

19mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

40m

Dial Color

Silver

Jewels

30j

Frequency

28,800 bph

Power Reserve

60 hours

Year

1971

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