Seiko Cal. 3891 - 720

This Spring Drive model from 1972 features a 43mm PVD Black case. With its 21mm lug width and 14.1mm profile, it sits comfortably on most wrists. [seikata-wm-c217c2ad57e4]

Also known as: Turtle

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

43mm

Case Thickness

14.1mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

200m

Dial Color

Burgundy

Jewels

28j

Frequency

36,000 bph

Power Reserve

36 hours

Year

1972

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