Seiko Cal. 6643 - 821

The Seiko 6643-821 represents an important milestone in Seiko's 1992 lineup. With its 21mm lug width and 10.5mm profile, it sits comfortably on most wrists. [seikata-wm-4fa87a3224e7]

Also known as: Bellmatic

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

43mm

Case Thickness

10.5mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

50m

Dial Color

Navy

Jewels

27j

Frequency

36,000 bph

Power Reserve

56 hours

Year

1992

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