Seiko Cal. 6678 - 632

The 6678-632 is a sought-after Quartz piece from Seiko's golden era. Powered by the 6678 caliber with 18j jewels beating at 21,600 bph, it delivers a 68 hours power reserve. [seikata-wm-1d902add33a3]

Also known as: Sumo

Specifications

Movement

Quartz

Case Material

PVD Black

Case Width

41mm

Case Thickness

12.1mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

100m

Dial Color

Silver

Jewels

18j

Frequency

21,600 bph

Power Reserve

68 hours

Year

1989

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