Seiko Cal. 5644 - 139

The Seiko 5644-139 represents an important milestone in Seiko's 1981 lineup. The Fixed bezel and 46mm case give it a distinctive presence on the wrist. [seikata-wm-4219fcbe1ab2]

Also known as: Sumo

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

46mm

Case Thickness

13.6mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

70m

Dial Color

Cream

Jewels

20j

Frequency

28,800 bph

Power Reserve

50 hours

Year

1981

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