Seiko Cal. 6644 - 910

Released in 1968, the Cal. 6644 with design code 910 was part of Seiko's domestic market collection. With its 18mm lug width and 9.7mm profile, it sits comfortably on most wrists. [seikata-wm-097ffb4ab6b2]

Also known as: UFO

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

46mm

Case Thickness

9.7mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

100m

Dial Color

White

Jewels

34j

Frequency

36,000 bph

Power Reserve

65 hours

Year

1968

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