Seiko Cal. 6640 - 633

Seiko 6640-633

This Automatic model from 1991 features a 34mm Titanium case. The Bidirectional bezel and 34mm case give it a distinctive presence on the wrist. [seikata-wm-c413177be450]

Also known as: Turtle, Sumo

Specifications

Movement
Automatic
Case Material
Titanium
Case Width
34mm
Case Thickness
12.0mm
Lug Width
18mm
Crystal
Sapphire
Bezel
Bidirectional
Water Resistance
140m
Dial Color
Black
Jewels
28j
Frequency
28,800 bph
Power Reserve
49 hours
Year
1991

Related Models

seikata-wm-c413177be450