Seiko Cal. 5690 - 958

This Automatic model from 1969 features a 37mm Two-Tone case. Powered by the 5690 caliber with 28j jewels beating at 21,600 bph, it delivers a 70 hours power reserve. [seikata-wm-668d4a87ee93]

Also known as: Tuna

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

37mm

Case Thickness

15.1mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

140m

Dial Color

Black

Jewels

28j

Frequency

21,600 bph

Power Reserve

70 hours

Year

1969

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