Seiko Cal. 6391 - 294

This Spring Drive model from 1988 features a 36mm Two-Tone case. Powered by the 6391 caliber with 18j jewels beating at 21,600 bph, it delivers a 50 hours power reserve. [seikata-wm-4d8aee2cca8f]

Also known as: Sportsmatic, World Timer

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

36mm

Case Thickness

12.3mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

200m

Dial Color

Navy

Jewels

18j

Frequency

21,600 bph

Power Reserve

50 hours

Year

1988

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