Seiko Cal. 6390 - 142

The Seiko 6390-142 represents an important milestone in Seiko's 1986 lineup. Powered by the 6390 caliber with 21j jewels beating at 21,600 bph, it delivers a 63 hours power reserve. [seikata-wm-e1ac5f61561a]

Also known as: Helmet

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

46mm

Case Thickness

14.0mm

Lug Width

21mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

80m

Dial Color

Blue Sunburst

Jewels

21j

Frequency

21,600 bph

Power Reserve

63 hours

Year

1986

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