Seiko Cal. 6647 - 755

This Spring Drive model from 1988 features a 40mm Hardlex-Coated Steel case. With its 19mm lug width and 8.7mm profile, it sits comfortably on most wrists. [seikata-wm-42c324014085]

Also known as: Bullhead, Silverwave

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

40mm

Case Thickness

8.7mm

Lug Width

19mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

190m

Dial Color

Blue Sunburst

Jewels

17j

Frequency

21,600 bph

Power Reserve

50 hours

Year

1988

Related Models

• Seiko 4565-899
• Seiko 7144-834
• Seiko 5237-753
• Seiko 5237-233
• Seiko 3860-924
• Seiko 5298-871
• Seiko 7195-203
• Seiko 0752-556
• Seiko 4586-653
• Seiko 4420-388
• Seiko 5242-306
• Seiko 7119-294