Seiko Cal. 6631 - 354

The Seiko 6631-354 represents an important milestone in Seiko's 1986 lineup. Powered by the 6631 caliber with 24j jewels beating at 28,800 bph, it delivers a 45 hours power reserve. [seikata-wm-afdd061c4cc5]

Also known as: UFO, Goldfeather

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

41mm

Case Thickness

15.9mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

70m

Dial Color

Blue Sunburst

Jewels

24j

Frequency

28,800 bph

Power Reserve

45 hours

Year

1986

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