Seiko Cal. 5638 - 473

The Seiko 5638-473 represents an important milestone in Seiko's 1990 lineup. With its 18mm lug width and 12.7mm profile, it sits comfortably on most wrists. [seikata-wm-6e041dae7e76]

Also known as: Sportsmatic, Baby Tuna

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

43mm

Case Thickness

12.7mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

100m

Dial Color

White

Jewels

34j

Frequency

28,800 bph

Power Reserve

46 hours

Year

1990

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