Seiko Cal. 6639 - 310

Seiko 6639-310

This Spring Drive model from 1973 features a 34mm Titanium case. The Coin-Edge bezel and 34mm case give it a distinctive presence on the wrist. [seikata-wm-f1d03a58867c]

Also known as: Monster, Tuna

Specifications

Movement
Spring Drive
Case Material
Titanium
Case Width
34mm
Case Thickness
10.1mm
Lug Width
21mm
Crystal
Mineral
Bezel
Coin-Edge
Water Resistance
150m
Dial Color
Blue Sunburst
Jewels
31j
Frequency
36,000 bph
Power Reserve
58 hours
Year
1973

Related Models

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