Seiko Cal. 6640 - 190

Released in 1982, the Cal. 6640 with design code 190 was part of Seiko's domestic market collection. With its 21mm lug width and 8.8mm profile, it sits comfortably on most wrists. [seikata-wm-f63dabb2cdf1]

Also known as: Sumo, Sportsmatic

Specifications

Movement

Solar

Case Material

Two-Tone

Case Width

41mm

Case Thickness

8.8mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

140m

Dial Color

Cream

Jewels

29j

Frequency

36,000 bph

Power Reserve

66 hours

Year

1982

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