Seiko Cal. 7181 - 581

This Spring Drive model from 1987 features a 37mm Hardlex-Coated Steel case. With its 20mm lug width and 10.1mm profile, it sits comfortably on most wrists. [seikata-wm-477dff5e980e]

Also known as: Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

10.1mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

150m

Dial Color

Burgundy

Jewels

17j

Frequency

21,600 bph

Power Reserve

42 hours

Year

1987

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