Seiko Cal. 3817 - 717

The Seiko 3817-717 represents an important milestone in Seiko's 1981 lineup. The Inner Rotating bezel and 43mm case give it a distinctive presence on the wrist. [seikata-wm-76da8a298174]

Also known as: Sumo, Bullhead

Specifications

Movement

Quartz

Case Material

PVD Black

Case Width

43mm

Case Thickness

15.6mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

110m

Dial Color

Champagne

Jewels

27j

Frequency

28,800 bph

Power Reserve

54 hours

Year

1981

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