Seiko Cal. 6399 - 638

The 6399-638 is a sought-after Automatic piece from Seiko's golden era. It features a Black dial protected by a Sapphire crystal and offers 80m of water resistance. [seikata-wm-6602e1155d8b]

Also known as: Helmet, Sea Horse

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

38mm

Case Thickness

15.7mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

80m

Dial Color

Black

Jewels

17j

Frequency

28,800 bph

Power Reserve

67 hours

Year

1971

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