Seiko Cal. 6391 - 375

The Seiko 6391-375 represents an important milestone in Seiko's 1975 lineup. It features a Blue Sunburst dial protected by a Acrylic crystal and offers 60m of water resistance. [seikata-wm-f7c53970ed12]

Also known as: Helmet

Specifications

Movement

Kinetic

Case Material

Hardlex-Coated Steel

Case Width

36mm

Case Thickness

15.2mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

60m

Dial Color

Blue Sunburst

Jewels

18j

Frequency

28,800 bph

Power Reserve

62 hours

Year

1975

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