Seiko Cal. 6391 - 633

The Seiko 6391-633 represents an important milestone in Seiko's 1969 lineup. The Bidirectional bezel and 44mm case give it a distinctive presence on the wrist. [seikata-wm-4ff97df1b40e]

Also known as: Monster

Specifications

Movement

Quartz

Case Material

Stainless Steel

Case Width

44mm

Case Thickness

14.9mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

100m

Dial Color

Burgundy

Jewels

19j

Frequency

21,600 bph

Power Reserve

62 hours

Year

1969

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