Seiko Cal. 6647 - 825

The Seiko 6647-825 represents an important milestone in Seiko's 1991 lineup. Powered by the 6647 caliber with 23j jewels beating at 36,000 bph, it delivers a 55 hours power reserve. [seikata-wm-a1209128ebce]

Also known as: Sumo

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

45mm

Case Thickness

11.4mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

110m

Dial Color

Silver

Jewels

23j

Frequency

36,000 bph

Power Reserve

55 hours

Year

1991

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