Seiko Cal. 6638 - 636

Seiko 6638-636

The 6638-636 is a sought-after Solar piece from Seiko's golden era. With its 19mm lug width and 10.2mm profile, it sits comfortably on most wrists. [seikata-wm-c9d18c751d5f]

Also known as: Turtle, Silverwave

Specifications

Movement
Solar
Case Material
Titanium
Case Width
37mm
Case Thickness
10.2mm
Lug Width
19mm
Crystal
Mineral
Bezel
Inner Rotating
Water Resistance
190m
Dial Color
Navy
Jewels
18j
Frequency
36,000 bph
Power Reserve
50 hours
Year
1972

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