Seiko Cal. 6638 - 348

Seiko 6638-348

This Quartz model from 1977 features a 37mm PVD Black case. With its 20mm lug width and 10.7mm profile, it sits comfortably on most wrists. [seikata-wm-1e3443a2c90b]

Also known as: Bullhead, Silverwave

Specifications

Movement
Quartz
Case Material
PVD Black
Case Width
37mm
Case Thickness
10.7mm
Lug Width
20mm
Crystal
Sapphire
Bezel
Fixed
Water Resistance
80m
Dial Color
Blue Sunburst
Jewels
17j
Frequency
28,800 bph
Power Reserve
56 hours
Year
1977

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