Seiko Cal. 5631 - 774

Seiko 5631-774

This Spring Drive model from 1987 features a 34mm Hardlex-Coated Steel case. With its 18mm lug width and 9.3mm profile, it sits comfortably on most wrists. [seikata-wm-6afe34c07b69]

Also known as: Baby Tuna

Specifications

Movement
Spring Drive
Case Material
Hardlex-Coated Steel
Case Width
34mm
Case Thickness
9.3mm
Lug Width
18mm
Crystal
Acrylic
Bezel
Fixed
Water Resistance
70m
Dial Color
Silver
Jewels
18j
Frequency
28,800 bph
Power Reserve
61 hours
Year
1987

Related Models

seikata-wm-6afe34c07b69