Seiko Cal. 3817 - 931

The Seiko 3817-931 represents an important milestone in Seiko's 1965 lineup. Powered by the 3817 caliber with 17j jewels beating at 28,800 bph, it delivers a 52 hours power reserve. [seikata-wm-966e4598d91f]

Also known as: Samurai, Sportsmatic

Specifications

Movement

Quartz

Case Material

Titanium

Case Width

38mm

Case Thickness

13.1mm

Lug Width

18mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

80m

Dial Color

Green

Jewels

17j

Frequency

28,800 bph

Power Reserve

52 hours

Year

1965

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