Seiko Cal. 6640 - 434

Seiko 6640-434

This Hand-Winding model from 1975 features a 41mm Hardlex-Coated Steel case. The Rotating bezel and 41mm case give it a distinctive presence on the wrist. [seikata-wm-5e2925251826]

Specifications

Movement
Hand-Winding
Case Material
Hardlex-Coated Steel
Case Width
41mm
Case Thickness
14.4mm
Lug Width
18mm
Crystal
Sapphire
Bezel
Rotating
Water Resistance
140m
Dial Color
Navy
Jewels
28j
Frequency
28,800 bph
Power Reserve
56 hours
Year
1975

Related Models

seikata-wm-5e2925251826