Seiko Cal. 6640 - 732

Seiko 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

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