Seiko Cal. 6640 - 195

This Spring Drive model from 1965 features a 45mm Hardlex-Coated Steel case. Powered by the 6640 caliber with 34j jewels beating at 28,800 bph, it delivers a 52 hours power reserve. [seikata-wm-a7a37388415b]

Also known as: UFO, Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

45mm

Case Thickness

12.8mm

Lug Width

18mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

190m

Dial Color

Blue Sunburst

Jewels

34j

Frequency

28,800 bph

Power Reserve

52 hours

Year

1965

Related Models

• Seiko 7064-211
• Seiko 4531-226
• Seiko 6287-509
• Seiko 6612-177
• Seiko 4460-552
• Seiko 6222-295
• Seiko 6179-717
• Seiko 4439-214
• Seiko 7143-587
• Seiko 0773-908
• Seiko 6241-549
• Seiko 4592-894