Seiko Cal. 5640 - 761

The Seiko 5640-761 represents an important milestone in Seiko's 1995 lineup. With its 19mm lug width and 10.3mm profile, it sits comfortably on most wrists. [seikata-wm-fe4711d5ce81]

Also known as: Bullhead

Specifications

Movement

Automatic

Case Material

Gold-Plated

Case Width

34mm

Case Thickness

10.3mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

160m

Dial Color

Blue Sunburst

Jewels

36j

Frequency

21,600 bph

Power Reserve

49 hours

Year

1995

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