Seiko Cal. 6628 - 906

The Seiko 6628-906 represents an important milestone in Seiko's 1976 lineup. Powered by the 6628 caliber with 33j jewels beating at 21,600 bph, it delivers a 61 hours power reserve. [seikata-wm-17336180f224]

Also known as: Sumo, Navigator

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

44mm

Case Thickness

9.2mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

100m

Dial Color

Burgundy

Jewels

33j

Frequency

21,600 bph

Power Reserve

61 hours

Year

1976

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