Seiko Cal. 5631 - 490

Seiko 5631-490

This Hand-Winding model from 1976 features a 42mm Stainless Steel case. The Rotating bezel and 42mm case give it a distinctive presence on the wrist. [seikata-wm-323469f8543e]

Also known as: Sea Horse

Specifications

Movement
Hand-Winding
Case Material
Stainless Steel
Case Width
42mm
Case Thickness
10.4mm
Lug Width
20mm
Crystal
Acrylic
Bezel
Rotating
Water Resistance
40m
Dial Color
Silver
Jewels
25j
Frequency
21,600 bph
Power Reserve
53 hours
Year
1976

Related Models

seikata-wm-323469f8543e