Seiko Cal. 6391 - 833

This Spring Drive model from 1971 features a 40mm Two-Tone case. The Rotating bezel and 40mm case give it a distinctive presence on the wrist. [seikata-wm-0775c0ae2050]

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

40mm

Case Thickness

8.1mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

130m

Dial Color

Navy

Jewels

23j

Frequency

21,600 bph

Power Reserve

47 hours

Year

1971

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