Seiko Cal. 6657 - 187

This Spring Drive model from 1981 features a 40mm Stainless Steel case. It features a Blue Sunburst dial protected by a Hardlex crystal and offers 70m of water resistance. [seikata-wm-009eb76ef621]

Also known as: Samurai

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

40mm

Case Thickness

15.9mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

70m

Dial Color

Blue Sunburst

Jewels

19j

Frequency

21,600 bph

Power Reserve

53 hours

Year

1981

Related Models

• Seiko 6158-605
• Seiko 5626-574
• Seiko 6167-410
• Seiko 3819-526
• Seiko 5218-731
• Seiko 3835-155
• Seiko 7156-392
• Seiko 7175-387
• Seiko 5650-227
• Seiko 5261-297
• Seiko 7122-229
• Seiko 4589-330