Seiko Cal. 5657 - 401

Seiko 5657-401

This Spring Drive model from 1991 features a 37mm Titanium case. The Inner Rotating bezel and 37mm case give it a distinctive presence on the wrist. [seikata-wm-4cc72850d307]

Also known as: Sumo, Pogue

Specifications

Movement
Spring Drive
Case Material
Titanium
Case Width
37mm
Case Thickness
14.2mm
Lug Width
19mm
Crystal
Mineral
Bezel
Inner Rotating
Water Resistance
170m
Dial Color
Green
Jewels
33j
Frequency
21,600 bph
Power Reserve
47 hours
Year
1991

Related Models

seikata-wm-4cc72850d307