Seiko Cal. 5634 - 764

The Seiko 5634-764 represents an important milestone in Seiko's 1983 lineup. With its 21mm lug width and 15.8mm profile, it sits comfortably on most wrists. [seikata-wm-6ebe4164247d]

Also known as: Tuna, Bellmatic

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

39mm

Case Thickness

15.8mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

160m

Dial Color

Blue Sunburst

Jewels

29j

Frequency

28,800 bph

Power Reserve

38 hours

Year

1983

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