Seiko Cal. 6643 - 392

The Seiko 6643-392 represents an important milestone in Seiko's 1970 lineup. With its 20mm lug width and 12.4mm profile, it sits comfortably on most wrists. [seikata-wm-c02c584e0cc1]

Also known as: UFO

Specifications

Movement

Solar

Case Material

Gold-Plated

Case Width

41mm

Case Thickness

12.4mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

50m

Dial Color

Blue Sunburst

Jewels

34j

Frequency

36,000 bph

Power Reserve

72 hours

Year

1970

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