Seiko Cal. 3817 - 958

This Spring Drive model from 1971 features a 45mm Titanium case. Powered by the 3817 caliber with 34j jewels beating at 28,800 bph, it delivers a 56 hours power reserve. [seikata-wm-7e5041417c9e]

Also known as: Tuna

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

45mm

Case Thickness

9.1mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

100m

Dial Color

Silver

Jewels

34j

Frequency

28,800 bph

Power Reserve

56 hours

Year

1971

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