Seiko Cal. 3813 - 181

This Spring Drive model from 1981 features a 46mm Two-Tone case. With its 20mm lug width and 9.3mm profile, it sits comfortably on most wrists. [seikata-wm-95d24149215d]

Also known as: Sea Horse

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

46mm

Case Thickness

9.3mm

Lug Width

20mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

100m

Dial Color

Burgundy

Jewels

25j

Frequency

36,000 bph

Power Reserve

66 hours

Year

1981

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