Seiko Cal. 3817 - 923

The Seiko 3817-923 represents an important milestone in Seiko's 1991 lineup. Powered by the 3817 caliber with 23j jewels beating at 36,000 bph, it delivers a 71 hours power reserve. [seikata-wm-f90204a87f53]

Also known as: Sumo

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

35mm

Case Thickness

8.1mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

180m

Dial Color

Champagne

Jewels

23j

Frequency

36,000 bph

Power Reserve

71 hours

Year

1991

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