Seiko Cal. 6640 - 467

This Spring Drive model from 1981 features a 45mm Titanium case. Powered by the 6640 caliber with 23j jewels beating at 36,000 bph, it delivers a 38 hours power reserve. [seikata-wm-59ab6d4c807b]

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

45mm

Case Thickness

11.2mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

110m

Dial Color

Blue Sunburst

Jewels

23j

Frequency

36,000 bph

Power Reserve

38 hours

Year

1981

Related Models

• Seiko 0725-286
• Seiko 0761-797
• Seiko 6673-862
• Seiko 6283-560
• Seiko 6642-405
• Seiko 6618-379
• Seiko 5237-278
• Seiko 3870-555
• Seiko 4540-677
• Seiko 4451-967
• Seiko 0778-192
• Seiko 6677-231