Seiko Cal. 6391 - 646

The Seiko 6391-646 represents an important milestone in Seiko's 1977 lineup. It features a Cream dial protected by a Hardlex crystal and offers 190m of water resistance. [seikata-wm-13f42d91d3af]

Also known as: Sportsmatic, Arnie

Specifications

Movement

Kinetic

Case Material

Hardlex-Coated Steel

Case Width

35mm

Case Thickness

13.3mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

190m

Dial Color

Cream

Jewels

35j

Frequency

21,600 bph

Power Reserve

44 hours

Year

1977

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