Seiko Cal. 6639 - 612

Seiko 6639-612

This Quartz model from 1974 features a 44mm Titanium case. The Rotating bezel and 44mm case give it a distinctive presence on the wrist. [seikata-wm-bbb616a5e2d9]

Also known as: Helmet

Specifications

Movement
Quartz
Case Material
Titanium
Case Width
44mm
Case Thickness
14.7mm
Lug Width
18mm
Crystal
Acrylic
Bezel
Rotating
Water Resistance
120m
Dial Color
Black
Jewels
23j
Frequency
21,600 bph
Power Reserve
45 hours
Year
1974

Related Models

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