Seiko Cal. 3815 - 311

The Seiko 3815-311 represents an important milestone in Seiko's 1974 lineup. Powered by the 3815 caliber with 29j jewels beating at 21,600 bph, it delivers a 45 hours power reserve. [seikata-wm-1f041a500982]

Also known as: Sportsmatic

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

45mm

Case Thickness

8.0mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

60m

Dial Color

Blue Sunburst

Jewels

29j

Frequency

21,600 bph

Power Reserve

45 hours

Year

1974

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