Seiko Cal. 5631 - 306

Seiko 5631-306

This Solar model from 1969 features a 37mm Two-Tone case. The Bidirectional bezel and 37mm case give it a distinctive presence on the wrist. [seikata-wm-04c805509c41]

Also known as: Baby Tuna

Specifications

Movement
Solar
Case Material
Two-Tone
Case Width
37mm
Case Thickness
13.4mm
Lug Width
20mm
Crystal
Hardlex
Bezel
Bidirectional
Water Resistance
80m
Dial Color
Cream
Jewels
20j
Frequency
21,600 bph
Power Reserve
59 hours
Year
1969

Related Models

seikata-wm-04c805509c41