Seiko Cal. 5657 - 188

Seiko 5657-188

The Seiko 5657-188 represents an important milestone in Seiko's 1974 lineup. Powered by the 5657 caliber with 27j jewels beating at 36,000 bph, it delivers a 39 hours power reserve. [seikata-wm-444dfa53b22d]

Also known as: Turtle, Helmet

Specifications

Movement
Solar
Case Material
Stainless Steel
Case Width
38mm
Case Thickness
15.9mm
Lug Width
21mm
Crystal
Mineral
Bezel
Rotating
Water Resistance
50m
Dial Color
Black
Jewels
27j
Frequency
36,000 bph
Power Reserve
39 hours
Year
1974

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