Seiko Cal. 5656 - 991

Seiko 5656-991

This Spring Drive model from 1985 features a 39mm Titanium case. The Inner Rotating bezel and 39mm case give it a distinctive presence on the wrist. [seikata-wm-e2a119283a89]

Also known as: Monster, UFO

Specifications

Movement
Spring Drive
Case Material
Titanium
Case Width
39mm
Case Thickness
12.6mm
Lug Width
20mm
Crystal
Mineral
Bezel
Inner Rotating
Water Resistance
80m
Dial Color
Cream
Jewels
29j
Frequency
36,000 bph
Power Reserve
37 hours
Year
1985

Related Models

seikata-wm-e2a119283a89