Seiko Cal. 6643 - 253

The Seiko 6643-253 represents an important milestone in Seiko's 1969 lineup. With its 20mm lug width and 13.8mm profile, it sits comfortably on most wrists. [seikata-wm-6871c17ec9e3]

Also known as: Bullhead

Specifications

Movement

Quartz

Case Material

Titanium

Case Width

45mm

Case Thickness

13.8mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

50m

Dial Color

Blue Sunburst

Jewels

26j

Frequency

28,800 bph

Power Reserve

48 hours

Year

1969

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