Seiko Cal. 5657 - 320

Seiko 5657-320

This Spring Drive model from 1980 features a 44mm Hardlex-Coated Steel case. The Bidirectional bezel and 44mm case give it a distinctive presence on the wrist. [seikata-wm-769c9bac930b]

Also known as: Sportsmatic, World Timer

Specifications

Movement
Spring Drive
Case Material
Hardlex-Coated Steel
Case Width
44mm
Case Thickness
9.9mm
Lug Width
22mm
Crystal
Acrylic
Bezel
Bidirectional
Water Resistance
130m
Dial Color
Blue Sunburst
Jewels
35j
Frequency
36,000 bph
Power Reserve
64 hours
Year
1980

Related Models

seikata-wm-769c9bac930b