Seiko Cal. 6391 - 873

The Seiko 6391-873 represents an important milestone in Seiko's 1966 lineup. The Rotating bezel and 44mm case give it a distinctive presence on the wrist. [seikata-wm-234fa25bfee7]

Also known as: Helmet

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

44mm

Case Thickness

14.4mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

130m

Dial Color

Navy

Jewels

35j

Frequency

36,000 bph

Power Reserve

67 hours

Year

1966

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