Seiko Cal. 6631 - 674

This Spring Drive model from 1984 features a 43mm Stainless Steel case. With its 19mm lug width and 9.4mm profile, it sits comfortably on most wrists. [seikata-wm-808fa5267ec8]

Also known as: UFO, Silverwave

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

43mm

Case Thickness

9.4mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

170m

Dial Color

Green

Jewels

33j

Frequency

21,600 bph

Power Reserve

68 hours

Year

1984

Related Models

• Seiko 6668-147
• Seiko 4550-713
• Seiko 5242-777
• Seiko 6140-957
• Seiko 6121-968
• Seiko 4422-222
• Seiko 6199-458
• Seiko 6679-574
• Seiko 0724-621
• Seiko 6661-810
• Seiko 4470-654
• Seiko 5255-386