Seiko Cal. 3881 - 531

This Spring Drive model from 1969 features a 46mm PVD Black case. With its 18mm lug width and 11.3mm profile, it sits comfortably on most wrists. [seikata-wm-49ebc68a4813]

Also known as: Monster, Crown

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

46mm

Case Thickness

11.3mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

200m

Dial Color

Burgundy

Jewels

30j

Frequency

21,600 bph

Power Reserve

43 hours

Year

1969

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