Seiko Cal. 5639 - 788

The Seiko 5639-788 represents an important milestone in Seiko's 1999 lineup. With its 21mm lug width and 10.2mm profile, it sits comfortably on most wrists. [seikata-wm-5b5b2d33ecce]

Also known as: Baby Tuna, Emperor

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

35mm

Case Thickness

10.2mm

Lug Width

21mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

60m

Dial Color

White

Jewels

25j

Frequency

21,600 bph

Power Reserve

70 hours

Year

1999

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