Seiko Cal. 6391 - 721

The Seiko 6391-721 represents an important milestone in Seiko's 1980 lineup. It features a Champagne dial protected by a Acrylic crystal and offers 30m of water resistance. [seikata-wm-cb9a445d9d1b]

Also known as: Navigator, Emperor

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

8.1mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

30m

Dial Color

Champagne

Jewels

35j

Frequency

21,600 bph

Power Reserve

62 hours

Year

1980

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