Seiko Cal. 5639 - 378

The Seiko 5639-378 represents an important milestone in Seiko's 1984 lineup. The Coin-Edge bezel and 35mm case give it a distinctive presence on the wrist. [seikata-wm-157eb8690ffd]

Specifications

Movement

Solar

Case Material

Titanium

Case Width

35mm

Case Thickness

11.7mm

Lug Width

19mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

70m

Dial Color

Green

Jewels

30j

Frequency

21,600 bph

Power Reserve

64 hours

Year

1984

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