Seiko Cal. 5638 - 581

Seiko 5638-581

This Automatic model from 1973 features a 40mm Two-Tone case. The Fixed bezel and 40mm case give it a distinctive presence on the wrist. [seikata-wm-7940054d3431]

Specifications

Movement
Automatic
Case Material
Two-Tone
Case Width
40mm
Case Thickness
13.6mm
Lug Width
22mm
Crystal
Acrylic
Bezel
Fixed
Water Resistance
150m
Dial Color
Blue Sunburst
Jewels
21j
Frequency
21,600 bph
Power Reserve
40 hours
Year
1973

Related Models

seikata-wm-7940054d3431