Seiko Cal. 6639 - 991

Seiko 6639-991

This Quartz model from 1973 features a 41mm PVD Black case. The Bidirectional bezel and 41mm case give it a distinctive presence on the wrist. [seikata-wm-cb1b71daa66e]

Also known as: Tuna, Flighty

Specifications

Movement
Quartz
Case Material
PVD Black
Case Width
41mm
Case Thickness
9.0mm
Lug Width
21mm
Crystal
Mineral
Bezel
Bidirectional
Water Resistance
90m
Dial Color
Silver
Jewels
26j
Frequency
28,800 bph
Power Reserve
62 hours
Year
1973

Related Models

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