Seiko Cal. 6690 - 890

The Seiko 6690-890 represents an important milestone in Seiko's 1976 lineup. Powered by the 6690 caliber with 33j jewels beating at 36,000 bph, it delivers a 63 hours power reserve. [seikata-wm-e8f6ac2bfbd4]

Also known as: Sumo, Baby Tuna

Specifications

Movement

Kinetic

Case Material

Gold-Plated

Case Width

45mm

Case Thickness

11.8mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

200m

Dial Color

Green

Jewels

33j

Frequency

36,000 bph

Power Reserve

63 hours

Year

1976

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