Seiko Cal. 4478 - 138

The 4478-138 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 4478 caliber with 34j jewels beating at 36,000 bph, it delivers a 54 hours power reserve. [seikata-wm-ec95214874c3]

Also known as: Navigator

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

36mm

Case Thickness

9.0mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

100m

Dial Color

Black

Jewels

34j

Frequency

36,000 bph

Power Reserve

54 hours

Year

1982

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