Seiko Cal. 6391 - 520

The Seiko 6391-520 represents an important milestone in Seiko's 1983 lineup. Powered by the 6391 caliber with 20j jewels beating at 36,000 bph, it delivers a 56 hours power reserve. [seikata-wm-8206fc96022b]

Also known as: Sportsmatic, Emperor

Specifications

Movement

Quartz

Case Material

PVD Black

Case Width

34mm

Case Thickness

9.8mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

60m

Dial Color

Green

Jewels

20j

Frequency

36,000 bph

Power Reserve

56 hours

Year

1983

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