Seiko Cal. 6643 - 757

The Seiko 6643-757 represents an important milestone in Seiko's 1983 lineup. With its 20mm lug width and 10.6mm profile, it sits comfortably on most wrists. [seikata-wm-acc44de699c3]

Also known as: Samurai, Shogun

Specifications

Movement

Kinetic

Case Material

Titanium

Case Width

37mm

Case Thickness

10.6mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

160m

Dial Color

Navy

Jewels

21j

Frequency

28,800 bph

Power Reserve

68 hours

Year

1983

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