Seiko Cal. 5640 - 158

The Seiko 5640-158 represents an important milestone in Seiko's 1981 lineup. The Coin-Edge bezel and 39mm case give it a distinctive presence on the wrist. [seikata-wm-411fcc7ce05c]

Also known as: Pogue

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

39mm

Case Thickness

12.9mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

110m

Dial Color

Cream

Jewels

26j

Frequency

21,600 bph

Power Reserve

41 hours

Year

1981

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