Seiko Cal. 6640 - 769

This Kinetic model from 1968 features a 39mm Two-Tone case. Powered by the 6640 caliber with 34j jewels beating at 21,600 bph, it delivers a 38 hours power reserve. [seikata-wm-1896d52cb23b]

Also known as: Helmet, Silverwave

Specifications

Movement

Kinetic

Case Material

Two-Tone

Case Width

39mm

Case Thickness

14.4mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

130m

Dial Color

White

Jewels

34j

Frequency

21,600 bph

Power Reserve

38 hours

Year

1968

Related Models

• Seiko 5612-969
• Seiko 6628-768
• Seiko 5631-599
• Seiko 7011-483
• Seiko 5626-712
• Seiko 4553-251
• Seiko 5280-722
• Seiko 5668-616
• Seiko 6355-836
• Seiko 6316-781
• Seiko 5287-537
• Seiko 5251-965