Seiko Cal. 5639 - 728

The Seiko 5639-728 represents an important milestone in Seiko's 1991 lineup. Powered by the 5639 caliber with 33j jewels beating at 21,600 bph, it delivers a 47 hours power reserve. [seikata-wm-e96f205fa655]

Also known as: Shogun

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

44mm

Case Thickness

12.5mm

Lug Width

22mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

30m

Dial Color

Blue Sunburst

Jewels

33j

Frequency

21,600 bph

Power Reserve

47 hours

Year

1991

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