Seiko Cal. 5681 - 424

The Seiko 5681-424 represents an important milestone in Seiko's 1986 lineup. Powered by the 5681 caliber with 27j jewels beating at 21,600 bph, it delivers a 55 hours power reserve. [seikata-wm-f902df1abd80]

Also known as: Sumo, Navigator

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

36mm

Case Thickness

15.2mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

50m

Dial Color

Cream

Jewels

27j

Frequency

21,600 bph

Power Reserve

55 hours

Year

1986

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