Seiko Cal. 6663 - 337

The Seiko 6663-337 represents an important milestone in Seiko's 1999 lineup. Powered by the 6663 caliber with 29j jewels beating at 28,800 bph, it delivers a 40 hours power reserve. [seikata-wm-ca69b64c261c]

Also known as: Bullhead, Helmet

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

34mm

Case Thickness

12.6mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

100m

Dial Color

Blue Sunburst

Jewels

29j

Frequency

28,800 bph

Power Reserve

40 hours

Year

1999

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