Seiko Cal. 5640 - 920

The Seiko 5640-920 represents an important milestone in Seiko's 1971 lineup. With its 21mm lug width and 8.5mm profile, it sits comfortably on most wrists. [seikata-wm-632e0031f9d2]

Also known as: Shogun

Specifications

Movement

Quartz

Case Material

Gold-Plated

Case Width

39mm

Case Thickness

8.5mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

90m

Dial Color

Burgundy

Jewels

29j

Frequency

28,800 bph

Power Reserve

57 hours

Year

1971

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