Seiko Cal. 6643 - 136

Seiko 6643-136

The 6643-136 is a sought-after Automatic piece from Seiko's golden era. Powered by the 6643 caliber with 28j jewels beating at 28,800 bph, it delivers a 46 hours power reserve. [seikata-wm-1061b42ef86e]

Also known as: Rally, Crown

Specifications

Movement
Automatic
Case Material
Gold-Plated
Case Width
43mm
Case Thickness
13.7mm
Lug Width
22mm
Crystal
Sapphire
Bezel
Inner Rotating
Water Resistance
130m
Dial Color
Cream
Jewels
28j
Frequency
28,800 bph
Power Reserve
46 hours
Year
1972

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