Seiko Cal. 3867 - 851

This Spring Drive model from 1971 features a 46mm PVD Black case. With its 18mm lug width and 13.5mm profile, it sits comfortably on most wrists. [seikata-wm-510f72d6c39d]

Also known as: Helmet, Golden Tuna

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

46mm

Case Thickness

13.5mm

Lug Width

18mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

150m

Dial Color

Green

Jewels

34j

Frequency

21,600 bph

Power Reserve

70 hours

Year

1971

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