Seiko Cal. 6391 - 387

This Spring Drive model from 1968 features a 37mm Hardlex-Coated Steel case. It features a Black dial protected by a Hardlex crystal and offers 180m of water resistance. [seikata-wm-48ba34bf5589]

Also known as: Bullhead

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

12.3mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

180m

Dial Color

Black

Jewels

27j

Frequency

28,800 bph

Power Reserve

56 hours

Year

1968

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