Seiko Cal. 6644 - 777

The Seiko 6644-777 represents an important milestone in Seiko's 1980 lineup. With its 20mm lug width and 12.0mm profile, it sits comfortably on most wrists. [seikata-wm-f887fafb5309]

Also known as: Sumo, Flighty

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

38mm

Case Thickness

12.0mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

130m

Dial Color

White

Jewels

19j

Frequency

36,000 bph

Power Reserve

66 hours

Year

1980

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