Seiko Cal. 6640 - 923

Released in 1999, the Cal. 6640 with design code 923 was part of Seiko's domestic market collection. With its 19mm lug width and 13.3mm profile, it sits comfortably on most wrists. [seikata-wm-3a593b6be4ce]

Also known as: Panda

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

45mm

Case Thickness

13.3mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

40m

Dial Color

Champagne

Jewels

23j

Frequency

21,600 bph

Power Reserve

49 hours

Year

1999

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