Seiko Cal. 7031 - 789

This Automatic model from 1970 features a 39mm Two-Tone case. Powered by the 7031 caliber with 28j jewels beating at 28,800 bph, it delivers a 55 hours power reserve. [seikata-wm-f8c097b2f29e]

Also known as: Samurai, UFO

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

39mm

Case Thickness

14.5mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

200m

Dial Color

Blue Sunburst

Jewels

28j

Frequency

28,800 bph

Power Reserve

55 hours

Year

1970

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