Seiko Cal. 6636 - 943

Seiko 6636-943

The 6636-943 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6636 caliber with 20j jewels beating at 28,800 bph, it delivers a 56 hours power reserve. [seikata-wm-a5ecc9680371]

Also known as: Samurai, UFO

Specifications

Movement
Spring Drive
Case Material
PVD Black
Case Width
36mm
Case Thickness
13.8mm
Lug Width
18mm
Crystal
Mineral
Bezel
Fixed
Water Resistance
170m
Dial Color
Black
Jewels
20j
Frequency
28,800 bph
Power Reserve
56 hours
Year
1975

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seikata-wm-a5ecc9680371