Seiko Cal. 6399 - 730

The Seiko 6399-730 represents an important milestone in Seiko's 1987 lineup. Powered by the 6399 caliber with 20j jewels beating at 21,600 bph, it delivers a 48 hours power reserve. [seikata-wm-f1ea53adcd55]

Also known as: Helmet, Arnie

Specifications

Movement

Quartz

Case Material

Titanium

Case Width

44mm

Case Thickness

11.0mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

110m

Dial Color

Navy

Jewels

20j

Frequency

21,600 bph

Power Reserve

48 hours

Year

1987

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