Seiko Cal. 6399 - 987

The 6399-987 is a sought-after Quartz piece from Seiko's golden era. Powered by the 6399 caliber with 24j jewels beating at 28,800 bph, it delivers a 70 hours power reserve. [seikata-wm-39e5f52ee9c5]

Also known as: Sumo

Specifications

Movement

Quartz

Case Material

Titanium

Case Width

34mm

Case Thickness

8.5mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

30m

Dial Color

White

Jewels

24j

Frequency

28,800 bph

Power Reserve

70 hours

Year

1970

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