Seiko Cal. 6640 - 255

This Hand-Winding model from 1984 features a 38mm Stainless Steel case. The Inner Rotating bezel and 38mm case give it a distinctive presence on the wrist. [seikata-wm-18d54b5b7253]

Also known as: Crown

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

38mm

Case Thickness

9.2mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

60m

Dial Color

Blue Sunburst

Jewels

17j

Frequency

36,000 bph

Power Reserve

39 hours

Year

1984

Related Models

• Seiko 7050-986
• Seiko 5240-917
• Seiko 6158-490
• Seiko 6656-415
• Seiko 7166-767
• Seiko 6217-999
• Seiko 6678-356
• Seiko 6393-767
• Seiko 7120-840
• Seiko 0766-634
• Seiko 7127-860
• Seiko 5658-537