Seiko Cal. 6677 - 648

The 6677-648 is a sought-after Spring Drive piece from Seiko's golden era. It features a Black dial protected by a Hardlex crystal and offers 180m of water resistance. [seikata-wm-03a8b1dea8c3]

Also known as: Sumo, Emperor

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

40mm

Case Thickness

15.7mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

180m

Dial Color

Black

Jewels

19j

Frequency

36,000 bph

Power Reserve

36 hours

Year

1979

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