Seiko Cal. 3815 - 673

The Seiko 3815-673 represents an important milestone in Seiko's 1971 lineup. Powered by the 3815 caliber with 33j jewels beating at 21,600 bph, it delivers a 42 hours power reserve. [seikata-wm-d55fc0fca51f]

Also known as: Sportsmatic

Specifications

Movement

Solar

Case Material

PVD Black

Case Width

36mm

Case Thickness

14.1mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

160m

Dial Color

White

Jewels

33j

Frequency

21,600 bph

Power Reserve

42 hours

Year

1971

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