Seiko Cal. 3870 - 181

This Spring Drive model from 1969 features a 41mm PVD Black case. With its 21mm lug width and 13.8mm profile, it sits comfortably on most wrists. [seikata-wm-38091a1cd0e1]

Also known as: Helmet

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

41mm

Case Thickness

13.8mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

110m

Dial Color

Burgundy

Jewels

22j

Frequency

36,000 bph

Power Reserve

72 hours

Year

1969

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