Seiko Cal. 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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