Seiko Cal. 5640 - 104

The Seiko 5640-104 represents an important milestone in Seiko's 1971 lineup. With its 22mm lug width and 8.5mm profile, it sits comfortably on most wrists. [seikata-wm-f1ba89f16c25]

Also known as: Shogun, Crown

Specifications

Movement

Automatic

Case Material

Gold-Plated

Case Width

34mm

Case Thickness

8.5mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

80m

Dial Color

Green

Jewels

25j

Frequency

36,000 bph

Power Reserve

38 hours

Year

1971

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