Seiko Cal. 6390 - 705

This Automatic model from 1968 features a 45mm PVD Black case. Powered by the 6390 caliber with 30j jewels beating at 21,600 bph, it delivers a 68 hours power reserve. [seikata-wm-bb10ac6ff409]

Also known as: Sumo

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

45mm

Case Thickness

14.9mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

30m

Dial Color

White

Jewels

30j

Frequency

21,600 bph

Power Reserve

68 hours

Year

1968

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