Seiko Cal. 6628 - 398

The Seiko 6628-398 represents an important milestone in Seiko's 1972 lineup. Powered by the 6628 caliber with 27j jewels beating at 28,800 bph, it delivers a 50 hours power reserve. [seikata-wm-9d1817f3a575]

Also known as: UFO, World Timer

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

43mm

Case Thickness

12.9mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

170m

Dial Color

White

Jewels

27j

Frequency

28,800 bph

Power Reserve

50 hours

Year

1972

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