Seiko Cal. 6677 - 391

The 6677-391 is a sought-after Automatic piece from Seiko's golden era. It features a Navy dial protected by a Hardlex crystal and offers 200m of water resistance. [seikata-wm-e4a183681b4e]

Also known as: Sumo, Bullhead

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

45mm

Case Thickness

10.9mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

200m

Dial Color

Navy

Jewels

19j

Frequency

21,600 bph

Power Reserve

36 hours

Year

1999

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