Seiko Cal. 6640 - 732

The 6640-732 is a sought-after Kinetic piece from Seiko's golden era. Powered by the 6640 caliber with 20j jewels beating at 36,000 bph, it delivers a 57 hours power reserve. [seikata-wm-d3ea88a9a44d]

Also known as: Navigator, Emperor

Specifications

Movement

Kinetic

Case Material

Two-Tone

Case Width

39mm

Case Thickness

10.6mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

70m

Dial Color

Silver

Jewels

20j

Frequency

36,000 bph

Power Reserve

57 hours

Year

1989

Related Models

• Seiko 6648-469
• Seiko 6333-817
• Seiko 6185-988
• Seiko 7129-538
• Seiko 7086-194
• Seiko 0727-251
• Seiko 5263-981
• Seiko 0753-152
• Seiko 5257-403
• Seiko 4565-744
• Seiko 7191-533
• Seiko 6229-257