Seiko Cal. 6328 - 640

This Spring Drive model from 1988 features a 44mm Titanium case. Powered by the 6328 caliber with 26j jewels beating at 28,800 bph, it delivers a 40 hours power reserve. [seikata-wm-0fbb20483ecd]

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

44mm

Case Thickness

9.0mm

Lug Width

21mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

50m

Dial Color

White

Jewels

26j

Frequency

28,800 bph

Power Reserve

40 hours

Year

1988

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