Seiko Cal. 5657 - 587

Seiko 5657-587

The Seiko 5657-587 represents an important milestone in Seiko's 1970 lineup. Powered by the 5657 caliber with 35j jewels beating at 36,000 bph, it delivers a 56 hours power reserve. [seikata-wm-f2bca1d056c8]

Also known as: Bullhead, Bellmatic

Specifications

Movement
Kinetic
Case Material
Two-Tone
Case Width
34mm
Case Thickness
10.4mm
Lug Width
19mm
Crystal
Hardlex
Bezel
Fixed
Water Resistance
200m
Dial Color
Navy
Jewels
35j
Frequency
36,000 bph
Power Reserve
56 hours
Year
1970

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