Seiko Cal. 6643 - 840

Released in 1990, the Cal. 6643 with design code 840 was part of Seiko's domestic market collection. With its 21mm lug width and 13.8mm profile, it sits comfortably on most wrists. [seikata-wm-c7cd34af131f]

Also known as: Samurai, Silverwave

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

38mm

Case Thickness

13.8mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

120m

Dial Color

Navy

Jewels

31j

Frequency

21,600 bph

Power Reserve

53 hours

Year

1990

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