Seiko Cal. 5644 - 325

The Seiko 5644-325 represents an important milestone in Seiko's 1979 lineup. The Inner Rotating bezel and 46mm case give it a distinctive presence on the wrist. [seikata-wm-9de539d6c349]

Also known as: Sumo

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

46mm

Case Thickness

11.2mm

Lug Width

19mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

70m

Dial Color

Blue Sunburst

Jewels

31j

Frequency

36,000 bph

Power Reserve

50 hours

Year

1979

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