Seiko Cal. 3831 - 186

This Automatic model from 1973 features a 43mm Two-Tone case. With its 20mm lug width and 13.9mm profile, it sits comfortably on most wrists. [seikata-wm-2258d1173828]

Also known as: Sumo

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

43mm

Case Thickness

13.9mm

Lug Width

20mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

30m

Dial Color

Burgundy

Jewels

33j

Frequency

21,600 bph

Power Reserve

60 hours

Year

1973

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