Seiko Cal. 5631 - 864

Seiko 5631-864

The 5631-864 is a sought-after Kinetic piece from Seiko's golden era. The Rotating bezel and 36mm case give it a distinctive presence on the wrist. [seikata-wm-6712e3a084c8]

Also known as: UFO

Specifications

Movement
Kinetic
Case Material
Hardlex-Coated Steel
Case Width
36mm
Case Thickness
14.5mm
Lug Width
19mm
Crystal
Acrylic
Bezel
Rotating
Water Resistance
200m
Dial Color
Green
Jewels
30j
Frequency
36,000 bph
Power Reserve
65 hours
Year
1966

Related Models

seikata-wm-6712e3a084c8