Seiko Cal. 6399 - 603

The 6399-603 is a sought-after Automatic piece from Seiko's golden era. Powered by the 6399 caliber with 20j jewels beating at 28,800 bph, it delivers a 51 hours power reserve. [seikata-wm-3eff487cd6d5]

Also known as: Helmet, Arnie

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

44mm

Case Thickness

9.3mm

Lug Width

20mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

200m

Dial Color

Green

Jewels

20j

Frequency

28,800 bph

Power Reserve

51 hours

Year

1981

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