Seiko Cal. 6391 - 903

The Seiko 6391-903 represents an important milestone in Seiko's 1965 lineup. The Inner Rotating bezel and 35mm case give it a distinctive presence on the wrist. [seikata-wm-4027d4143ed8]

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

35mm

Case Thickness

10.0mm

Lug Width

20mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

180m

Dial Color

Burgundy

Jewels

23j

Frequency

21,600 bph

Power Reserve

46 hours

Year

1965

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