Seiko Cal. 6638 - 186

Seiko 6638-186

The 6638-186 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6638 caliber with 17j jewels beating at 28,800 bph, it delivers a 39 hours power reserve. [seikata-wm-6dcd560dc7b0]

Also known as: Sea Horse

Specifications

Movement
Spring Drive
Case Material
Two-Tone
Case Width
46mm
Case Thickness
12.7mm
Lug Width
22mm
Crystal
Acrylic
Bezel
Fixed
Water Resistance
160m
Dial Color
Black
Jewels
17j
Frequency
28,800 bph
Power Reserve
39 hours
Year
1974

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