Seiko Cal. 3851 - 315

This Spring Drive model from 1981 features a 39mm Stainless Steel case. With its 22mm lug width and 8.6mm profile, it sits comfortably on most wrists. [seikata-wm-7d678c1f1bf1]

Also known as: Tuna

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

39mm

Case Thickness

8.6mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

150m

Dial Color

White

Jewels

18j

Frequency

28,800 bph

Power Reserve

63 hours

Year

1981

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