Seiko Cal. 4531 - 384

This Spring Drive model from 1986 features a 36mm PVD Black case. With its 21mm lug width and 10.9mm profile, it sits comfortably on most wrists. [seikata-wm-8e5190dff68b]

Also known as: Tuna

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

36mm

Case Thickness

10.9mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

140m

Dial Color

Burgundy

Jewels

18j

Frequency

28,800 bph

Power Reserve

56 hours

Year

1986

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