Seiko Cal. 3815 - 991

This Spring Drive model from 1975 features a 43mm Titanium case. With its 21mm lug width and 10.3mm profile, it sits comfortably on most wrists. [seikata-wm-c8a06d0dc4b8]

Also known as: Sea Horse, Arnie

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

43mm

Case Thickness

10.3mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

80m

Dial Color

Burgundy

Jewels

17j

Frequency

28,800 bph

Power Reserve

67 hours

Year

1975

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