Seiko Cal. 6640 - 891

Seiko 6640-891

This Quartz model from 1974 features a 43mm Titanium case. The Inner Rotating bezel and 43mm case give it a distinctive presence on the wrist. [seikata-wm-d3702c37a237]

Also known as: Baby Tuna

Specifications

Movement
Quartz
Case Material
Titanium
Case Width
43mm
Case Thickness
11.0mm
Lug Width
21mm
Crystal
Mineral
Bezel
Inner Rotating
Water Resistance
120m
Dial Color
White
Jewels
27j
Frequency
21,600 bph
Power Reserve
66 hours
Year
1974

Related Models

seikata-wm-d3702c37a237