Seiko Cal. 6640 - 887

Released in 1983, the Cal. 6640 with design code 887 was part of Seiko's domestic market collection. With its 19mm lug width and 14.8mm profile, it sits comfortably on most wrists. [seikata-wm-adf1446a0c81]

Also known as: Emperor

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

39mm

Case Thickness

14.8mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

190m

Dial Color

Navy

Jewels

22j

Frequency

21,600 bph

Power Reserve

37 hours

Year

1983

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