Seiko Cal. 6639 - 444

Seiko 6639-444

This Automatic model from 1981 features a 34mm PVD Black case. Powered by the 6639 caliber with 17j jewels beating at 36,000 bph, it delivers a 71 hours power reserve. [seikata-wm-46136f390aac]

Specifications

Movement
Automatic
Case Material
PVD Black
Case Width
34mm
Case Thickness
11.3mm
Lug Width
21mm
Crystal
Acrylic
Bezel
Bidirectional
Water Resistance
100m
Dial Color
Silver
Jewels
17j
Frequency
36,000 bph
Power Reserve
71 hours
Year
1981

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seikata-wm-46136f390aac