Seiko Cal. 5640 - 228

The Seiko 5640-228 represents an important milestone in Seiko's 1999 lineup. Powered by the 5640 caliber with 18j jewels beating at 36,000 bph, it delivers a 44 hours power reserve. [seikata-wm-fb53fc05e4f5]

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

46mm

Case Thickness

11.0mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

200m

Dial Color

White

Jewels

18j

Frequency

36,000 bph

Power Reserve

44 hours

Year

1999

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