Seiko Cal. 5639 - 631

This Quartz model from 1982 features a 39mm Titanium case. With its 20mm lug width and 11.9mm profile, it sits comfortably on most wrists. [seikata-wm-1f8a1bf30d23]

Also known as: World Timer

Specifications

Movement

Quartz

Case Material

Titanium

Case Width

39mm

Case Thickness

11.9mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

50m

Dial Color

Navy

Jewels

28j

Frequency

36,000 bph

Power Reserve

38 hours

Year

1982

Related Models

• Seiko 4499-466
• Seiko 5235-479
• Seiko 6347-897
• Seiko 4576-650
• Seiko 5251-254
• Seiko 0771-367
• Seiko 4470-215
• Seiko 4599-500
• Seiko 7032-523
• Seiko 6352-163
• Seiko 5677-382
• Seiko 3820-779