Seiko Cal. 5678 - 639

Seiko 5678-639

The 5678-639 is a sought-after Automatic piece from Seiko's golden era. Powered by the 5678 caliber with 23j jewels beating at 36,000 bph, it delivers a 56 hours power reserve. [seikata-wm-f5826840ec68]

Also known as: Sumo

Specifications

Movement
Automatic
Case Material
PVD Black
Case Width
35mm
Case Thickness
13.9mm
Lug Width
19mm
Crystal
Sapphire
Bezel
Rotating
Water Resistance
180m
Dial Color
White
Jewels
23j
Frequency
36,000 bph
Power Reserve
56 hours
Year
1999

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