Seiko Cal. 5641 - 631

This Spring Drive model from 1998 features a 39mm Hardlex-Coated Steel case. With its 22mm lug width and 13.5mm profile, it sits comfortably on most wrists. [seikata-wm-d32d8373524c]

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

39mm

Case Thickness

13.5mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

190m

Dial Color

Blue Sunburst

Jewels

19j

Frequency

21,600 bph

Power Reserve

55 hours

Year

1998

Related Models

• Seiko 7057-592
• Seiko 7180-942
• Seiko 4457-361
• Seiko 6125-685
• Seiko 0736-781
• Seiko 5291-871
• Seiko 3863-586
• Seiko 5632-768
• Seiko 7013-189
• Seiko 7044-455
• Seiko 5684-347
• Seiko 7087-840