Seiko Cal. 5640 - 394

The Seiko 5640-394 represents an important milestone in Seiko's 1978 lineup. With its 21mm lug width and 8.5mm profile, it sits comfortably on most wrists. [seikata-wm-b49e0404e443]

Also known as: Shogun

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

42mm

Case Thickness

8.5mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

130m

Dial Color

White

Jewels

31j

Frequency

21,600 bph

Power Reserve

46 hours

Year

1978

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