Seiko Cal. 6657 - 410

Seiko 6657-410

This Spring Drive model from 1987 features a 42mm Stainless Steel case. Powered by the 6657 caliber with 24j jewels beating at 21,600 bph, it delivers a 59 hours power reserve. [seikata-wm-453458499d42]

Also known as: Sportsmatic

Specifications

Movement
Spring Drive
Case Material
Stainless Steel
Case Width
42mm
Case Thickness
8.3mm
Lug Width
21mm
Crystal
Acrylic
Bezel
Inner Rotating
Water Resistance
60m
Dial Color
White
Jewels
24j
Frequency
21,600 bph
Power Reserve
59 hours
Year
1987

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seikata-wm-453458499d42