Seiko Cal. 6640 - 357

Seiko 6640-357

This Solar model from 1973 features a 42mm PVD Black case. The Inner Rotating bezel and 42mm case give it a distinctive presence on the wrist. [seikata-wm-304cf62c27c9]

Also known as: Silverwave

Specifications

Movement
Solar
Case Material
PVD Black
Case Width
42mm
Case Thickness
8.0mm
Lug Width
22mm
Crystal
Acrylic
Bezel
Inner Rotating
Water Resistance
80m
Dial Color
Blue Sunburst
Jewels
32j
Frequency
36,000 bph
Power Reserve
49 hours
Year
1973

Related Models

seikata-wm-304cf62c27c9