Seiko Cal. 6390 - 381

The Seiko 6390-381 represents an important milestone in Seiko's 1990 lineup. Powered by the 6390 caliber with 20j jewels beating at 28,800 bph, it delivers a 52 hours power reserve. [seikata-wm-ab89c28d60ee]

Also known as: Shogun, UFO

Specifications

Movement

Automatic

Case Material

Gold-Plated

Case Width

39mm

Case Thickness

8.6mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

140m

Dial Color

Green

Jewels

20j

Frequency

28,800 bph

Power Reserve

52 hours

Year

1990

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