Seiko Cal. 5678 - 666

The 5678-666 is a sought-after Solar piece from Seiko's golden era. Powered by the 5678 caliber with 28j jewels beating at 28,800 bph, it delivers a 59 hours power reserve. [seikata-wm-dfad699859fb]

Also known as: Sumo, Bullhead

Specifications

Movement

Solar

Case Material

Stainless Steel

Case Width

45mm

Case Thickness

8.9mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

200m

Dial Color

Cream

Jewels

28j

Frequency

28,800 bph

Power Reserve

59 hours

Year

1972

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