Seiko Cal. 5643 - 725

The Seiko 5643-725 represents an important milestone in Seiko's 1969 lineup. Powered by the 5643 caliber with 30j jewels beating at 28,800 bph, it delivers a 40 hours power reserve. [seikata-wm-4c01c9f1f88a]

Also known as: Sumo

Specifications

Movement

Automatic

Case Material

Gold-Plated

Case Width

40mm

Case Thickness

14.6mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

50m

Dial Color

Green

Jewels

30j

Frequency

28,800 bph

Power Reserve

40 hours

Year

1969

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