Seiko Cal. 6668 - 139

The 6668-139 is a sought-after Quartz piece from Seiko's golden era. Powered by the 6668 caliber with 30j jewels beating at 21,600 bph, it delivers a 58 hours power reserve. [seikata-wm-8160fd7ed8fc]

Also known as: Sumo, Tuna

Specifications

Movement

Quartz

Case Material

PVD Black

Case Width

42mm

Case Thickness

12.6mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

190m

Dial Color

Green

Jewels

30j

Frequency

21,600 bph

Power Reserve

58 hours

Year

1967

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