Seiko Cal. 6647 - 577

This Spring Drive model from 1989 features a 42mm Titanium case. It features a Navy dial protected by a Acrylic crystal and offers 40m of water resistance. [seikata-wm-4051eb51d604]

Also known as: Sumo

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

42mm

Case Thickness

14.8mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

40m

Dial Color

Navy

Jewels

18j

Frequency

28,800 bph

Power Reserve

61 hours

Year

1989

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