Seiko Cal. 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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