Seiko Cal. 6621 - 721

The Seiko 6621-721 represents an important milestone in Seiko's 1990 lineup. Powered by the 6621 caliber with 30j jewels beating at 21,600 bph, it delivers a 71 hours power reserve. [seikata-wm-c836ef70ca9c]

Also known as: Tuna

Specifications

Movement

Kinetic

Case Material

Stainless Steel

Case Width

34mm

Case Thickness

10.6mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

70m

Dial Color

Black

Jewels

30j

Frequency

21,600 bph

Power Reserve

71 hours

Year

1990

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