Seiko Cal. 6640 - 754

The Seiko 6640-754 represents an important milestone in Seiko's 1991 lineup. With its 18mm lug width and 13.9mm profile, it sits comfortably on most wrists. [seikata-wm-fa653afdc0ad]

Also known as: Crown

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

43mm

Case Thickness

13.9mm

Lug Width

18mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

100m

Dial Color

Champagne

Jewels

23j

Frequency

21,600 bph

Power Reserve

68 hours

Year

1991

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