Seiko Cal. 6391 - 516

This Quartz model from 1971 features a 46mm PVD Black case. The Bidirectional bezel and 46mm case give it a distinctive presence on the wrist. [seikata-wm-0aa8b2b1d87f]

Also known as: Helmet, UFO

Specifications

Movement

Quartz

Case Material

PVD Black

Case Width

46mm

Case Thickness

15.1mm

Lug Width

20mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

180m

Dial Color

Blue Sunburst

Jewels

30j

Frequency

21,600 bph

Power Reserve

44 hours

Year

1971

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