Seiko Cal. 6640 - 873

The Seiko 6640-873 represents an important milestone in Seiko's 1995 lineup. Powered by the 6640 caliber with 22j jewels beating at 21,600 bph, it delivers a 39 hours power reserve. [seikata-wm-71266b774ce4]

Also known as: Silverwave

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

36mm

Case Thickness

9.8mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

130m

Dial Color

Cream

Jewels

22j

Frequency

21,600 bph

Power Reserve

39 hours

Year

1995

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