Seiko Cal. 6664 - 691

The Seiko 6664-691 represents an important milestone in Seiko's 1970 lineup. With its 19mm lug width and 9.3mm profile, it sits comfortably on most wrists. [seikata-wm-aecd37b72f8a]

Also known as: Shogun, UFO

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

44mm

Case Thickness

9.3mm

Lug Width

19mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

90m

Dial Color

Silver

Jewels

34j

Frequency

21,600 bph

Power Reserve

36 hours

Year

1970

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