Seiko Cal. 6631 - 147

The Seiko 6631-147 represents an important milestone in Seiko's 1991 lineup. It features a Green dial protected by a Sapphire crystal and offers 170m of water resistance. [seikata-wm-d3c41fecf20c]

Also known as: Sumo, Crown

Specifications

Movement

Solar

Case Material

Titanium

Case Width

37mm

Case Thickness

14.5mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

170m

Dial Color

Green

Jewels

28j

Frequency

28,800 bph

Power Reserve

42 hours

Year

1991

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