Seiko Cal. 6640 - 468

Seiko 6640-468

The Seiko 6640-468 represents an important milestone in Seiko's 1977 lineup. Powered by the 6640 caliber with 27j jewels beating at 21,600 bph, it delivers a 36 hours power reserve. [seikata-wm-96185a76aeec]

Also known as: Turtle, Arnie

Specifications

Movement
Automatic
Case Material
Titanium
Case Width
35mm
Case Thickness
9.0mm
Lug Width
21mm
Crystal
Mineral
Bezel
Inner Rotating
Water Resistance
50m
Dial Color
White
Jewels
27j
Frequency
21,600 bph
Power Reserve
36 hours
Year
1977

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