Seiko Cal. 3817 - 830

The 3817-830 is a sought-after Spring Drive piece from Seiko's golden era. With its 19mm lug width and 9.9mm profile, it sits comfortably on most wrists. [seikata-wm-31537da6cd2d]

Also known as: Tuna, Sportsmatic

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

42mm

Case Thickness

9.9mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

30m

Dial Color

Silver

Jewels

34j

Frequency

21,600 bph

Power Reserve

68 hours

Year

1993

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