Seiko Cal. 6640 - 558

The Seiko 6640-558 represents an important milestone in Seiko's 1984 lineup. With its 19mm lug width and 8.1mm profile, it sits comfortably on most wrists. [seikata-wm-40232371992b]

Also known as: Emperor, Flighty

Specifications

Movement

Quartz

Case Material

Stainless Steel

Case Width

36mm

Case Thickness

8.1mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

140m

Dial Color

Burgundy

Jewels

35j

Frequency

21,600 bph

Power Reserve

56 hours

Year

1984

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