Seiko Cal. 6647 - 661

The Seiko 6647-661 represents an important milestone in Seiko's 1997 lineup. Powered by the 6647 caliber with 28j jewels beating at 28,800 bph, it delivers a 47 hours power reserve. [seikata-wm-b873887865d1]

Also known as: Sumo, Golden Tuna

Specifications

Movement

Quartz

Case Material

Stainless Steel

Case Width

36mm

Case Thickness

10.0mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

100m

Dial Color

Navy

Jewels

28j

Frequency

28,800 bph

Power Reserve

47 hours

Year

1997

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