Seiko Cal. 5678 - 391

The Seiko 5678-391 represents an important milestone in Seiko's 1986 lineup. Powered by the 5678 caliber with 34j jewels beating at 28,800 bph, it delivers a 51 hours power reserve. [seikata-wm-7a8fe6278fe1]

Also known as: World Timer, Baby Tuna

Specifications

Movement

Quartz

Case Material

Stainless Steel

Case Width

36mm

Case Thickness

10.2mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

190m

Dial Color

Blue Sunburst

Jewels

34j

Frequency

28,800 bph

Power Reserve

51 hours

Year

1986

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