Seiko Cal. 6640 - 378

Seiko 6640-378

This Hand-Winding model from 1998 features a 40mm Titanium case. The Fixed bezel and 40mm case give it a distinctive presence on the wrist. [seikata-wm-9d72128c5fee]

Also known as: Golden Tuna

Specifications

Movement
Hand-Winding
Case Material
Titanium
Case Width
40mm
Case Thickness
13.1mm
Lug Width
20mm
Crystal
Mineral
Bezel
Fixed
Water Resistance
170m
Dial Color
Black
Jewels
33j
Frequency
21,600 bph
Power Reserve
49 hours
Year
1998

Related Models

seikata-wm-9d72128c5fee