Seiko Cal. 6631 - 127

This Spring Drive model from 1974 features a 45mm Stainless Steel case. It features a Blue Sunburst dial protected by a Acrylic crystal and offers 60m of water resistance. [seikata-wm-85a350a613a7]

Also known as: Silverwave, Crown

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

45mm

Case Thickness

10.8mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

60m

Dial Color

Blue Sunburst

Jewels

26j

Frequency

28,800 bph

Power Reserve

61 hours

Year

1974

Related Models

• Seiko 7015-211
• Seiko 6690-205
• Seiko 7075-706
• Seiko 6349-740
• Seiko 7195-426
• Seiko 6280-337
• Seiko 6374-500
• Seiko 6228-180
• Seiko 4559-356
• Seiko 3816-322
• Seiko 5625-241
• Seiko 5632-191