Seiko Cal. 6640 - 716

Seiko 6640-716

This Solar model from 1990 features a 42mm Hardlex-Coated Steel case. With its 21mm lug width and 9.3mm profile, it sits comfortably on most wrists. [seikata-wm-dc6c7d0cfe34]

Also known as: Tuna, Emperor

Specifications

Movement
Solar
Case Material
Hardlex-Coated Steel
Case Width
42mm
Case Thickness
9.3mm
Lug Width
21mm
Crystal
Sapphire
Bezel
Bidirectional
Water Resistance
40m
Dial Color
Silver
Jewels
18j
Frequency
21,600 bph
Power Reserve
51 hours
Year
1990

Related Models

seikata-wm-dc6c7d0cfe34