Seiko Cal. 5638 - 703

The Seiko 5638-703 represents an important milestone in Seiko's 1985 lineup. With its 19mm lug width and 9.7mm profile, it sits comfortably on most wrists. [seikata-wm-d345e9b4c661]

Also known as: Sumo, UFO

Specifications

Movement

Quartz

Case Material

Stainless Steel

Case Width

42mm

Case Thickness

9.7mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

150m

Dial Color

Cream

Jewels

36j

Frequency

21,600 bph

Power Reserve

43 hours

Year

1985

Related Models

• Seiko 6271-299
• Seiko 0733-136
• Seiko 6670-860
• Seiko 6680-337
• Seiko 7128-765
• Seiko 4469-961
• Seiko 6278-883
• Seiko 4566-381
• Seiko 6318-890
• Seiko 5616-650
• Seiko 7189-851
• Seiko 7020-815