Seiko Cal. 6390 - 422

The Seiko 6390-422 represents an important milestone in Seiko's 1970 lineup. With its 18mm lug width and 9.5mm profile, it sits comfortably on most wrists. [seikata-wm-90db402b9e1c]

Also known as: Panda, Helmet

Specifications

Movement

Kinetic

Case Material

Hardlex-Coated Steel

Case Width

39mm

Case Thickness

9.5mm

Lug Width

18mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

140m

Dial Color

Green

Jewels

32j

Frequency

28,800 bph

Power Reserve

66 hours

Year

1970

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