Seiko Cal. 5661 - 364

Seiko 5661-364

This Automatic model from 1987 features a 37mm Titanium case. The Inner Rotating bezel and 37mm case give it a distinctive presence on the wrist. [seikata-wm-e2c8afa35850]

Also known as: Sumo, Bullhead

Specifications

Movement
Automatic
Case Material
Titanium
Case Width
37mm
Case Thickness
10.4mm
Lug Width
21mm
Crystal
Mineral
Bezel
Inner Rotating
Water Resistance
150m
Dial Color
White
Jewels
28j
Frequency
21,600 bph
Power Reserve
61 hours
Year
1987

Related Models

seikata-wm-e2c8afa35850