Seiko Cal. 6643 - 689

Released in 1973, the Cal. 6643 with design code 689 was part of Seiko's domestic market collection. With its 21mm lug width and 12.7mm profile, it sits comfortably on most wrists. [seikata-wm-31bf4df9d3a9]

Also known as: Panda

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

45mm

Case Thickness

12.7mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

30m

Dial Color

Blue Sunburst

Jewels

26j

Frequency

21,600 bph

Power Reserve

66 hours

Year

1973

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