Seiko Cal. 6634 - 816

The Seiko 6634-816 represents an important milestone in Seiko's 1989 lineup. Powered by the 6634 caliber with 29j jewels beating at 21,600 bph, it delivers a 38 hours power reserve. [seikata-wm-ae09f7043185]

Also known as: Sumo, Golden Tuna

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

41mm

Case Thickness

12.3mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

180m

Dial Color

Champagne

Jewels

29j

Frequency

21,600 bph

Power Reserve

38 hours

Year

1989

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