Seiko Cal. 6391 - 502

The Seiko 6391-502 represents an important milestone in Seiko's 1971 lineup. With its 22mm lug width and 14.8mm profile, it sits comfortably on most wrists. [seikata-wm-75feb596b015]

Also known as: Bullhead, Arnie

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

41mm

Case Thickness

14.8mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

100m

Dial Color

Navy

Jewels

30j

Frequency

36,000 bph

Power Reserve

44 hours

Year

1971

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