Seiko Cal. 6390 - 399

The Seiko 6390-399 represents an important milestone in Seiko's 1974 lineup. Powered by the 6390 caliber with 34j jewels beating at 21,600 bph, it delivers a 71 hours power reserve. [seikata-wm-b75e0b7ca185]

Also known as: Bullhead

Specifications

Movement

Solar

Case Material

PVD Black

Case Width

38mm

Case Thickness

9.4mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

200m

Dial Color

Navy

Jewels

34j

Frequency

21,600 bph

Power Reserve

71 hours

Year

1974

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