Seiko Cal. 4426 - 647

The Seiko 4426-647 represents an important milestone in Seiko's 1981 lineup. The Rotating bezel and 41mm case give it a distinctive presence on the wrist. [seikata-wm-c574e3b5c264]

Also known as: Sumo, Panda

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

41mm

Case Thickness

9.5mm

Lug Width

21mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

200m

Dial Color

Navy

Jewels

18j

Frequency

28,800 bph

Power Reserve

67 hours

Year

1981

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