Seiko Cal. 5641 - 587

Seiko 5641-587

The Seiko 5641-587 represents an important milestone in Seiko's 1977 lineup. Powered by the 5641 caliber with 28j jewels beating at 21,600 bph, it delivers a 59 hours power reserve. [seikata-wm-4c7f1038f489]

Also known as: Turtle, Sumo

Specifications

Movement
Quartz
Case Material
Hardlex-Coated Steel
Case Width
44mm
Case Thickness
14.8mm
Lug Width
20mm
Crystal
Hardlex
Bezel
Inner Rotating
Water Resistance
50m
Dial Color
Cream
Jewels
28j
Frequency
21,600 bph
Power Reserve
59 hours
Year
1977

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seikata-wm-4c7f1038f489