Seiko Cal. 6640 - 694

Released in 1997, the Cal. 6640 with design code 694 was part of Seiko's domestic market collection. With its 22mm lug width and 15.8mm profile, it sits comfortably on most wrists. [seikata-wm-212ea0ea4948]

Also known as: Sportsmatic, Emperor

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

41mm

Case Thickness

15.8mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

180m

Dial Color

Burgundy

Jewels

19j

Frequency

28,800 bph

Power Reserve

48 hours

Year

1997

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