Seiko Cal. 6391 - 654

The 6391-654 is a sought-after Automatic piece from Seiko's golden era. It features a Black dial protected by a Hardlex crystal and offers 100m of water resistance. [seikata-wm-cc9f90f9f73b]

Also known as: Samurai, Sumo

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

10.5mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

100m

Dial Color

Black

Jewels

21j

Frequency

28,800 bph

Power Reserve

41 hours

Year

1968

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