Seiko Cal. 3815 - 591

This Spring Drive model from 1988 features a 43mm Hardlex-Coated Steel case. Powered by the 3815 caliber with 18j jewels beating at 21,600 bph, it delivers a 69 hours power reserve. [seikata-wm-274524f5e1a6]

Also known as: Bullhead, Crown

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

43mm

Case Thickness

8.7mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

180m

Dial Color

Cream

Jewels

18j

Frequency

21,600 bph

Power Reserve

69 hours

Year

1988

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